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6
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Pagina verder
O w n e r ’ s
M a n u a l
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G P S
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P e r s o n a l
N a v i g a t o r
®
GPS 12XL NEW Manual Rev A 2/6/98 3:17 PM Page 1
Software Version 4.0 or above
© 1998 GARMINCorporation, 1200 E. 151st Street, Olathe, Kansas 66062 USA
Tel: 913-397-8200 or 800-800-1020 Fax: 913-397-8282
GARMIN (Europe) Ltd., Unit 5, The Quadrangle, Abbey Park, Romsey, Hampshire SO51 9AQ UK
Tel: 011-44-1794-519944 Fax: 011-44-1794-519222
GARMIN (Asia) Corp., 4th Fl., No. 1, Lane 45, Pao-Hsing Road, Hsin Tien, Taiwan R.O.C.
Tel: 011-886-02-917-3773 Fax: 011-886-02-917-1758
Web Site Address: www.garmin.com
All rights reserved. No part of this manual may be reproduced or transmitted in any
form or by any means including photocopying and recording, for any purpose with-
out the express written permission of GARMIN.
Information in this document is subject to change without notice. GARMIN reserves
the right to change or improve its products and to make changes in the content with-
out obligation to notify any person or organization of such changes.
GARMIN, Personal Navigator, AutoLocate, TracBack, and PhaseTrac12 are all trade-
marks of GARMIN Corporation and may not be used without the expressed permis-
sion of GARMIN.
February 1998 - Part Number 190-00134-10 Rev. A - Printed in Taiwan.
GPS 12XL NEW Manual Rev A 2/6/98 3:17 PM Page 2
GPS 12XL
Operator’s
Manual
Thank you for choosing the GARMIN GPS 12XL —the smallest, easi-
est-to-use GPS navigator for outdoor use! The GPS 12XL represents
GARMIN’s continuing commitment to provide quality navigation informa-
tion in a versatile and user-friendly flexible design you’ll enjoy for years.
To get the most from your new GPS, take the time to read through the
owner’s manual in order to understand the operating features of the GPS
12XL. This manual is organized into four sections for your convenience:
Introduction gives a quick overview of the manual and contains the
table of contents and the glossary of navigational terms.
Getting Started introduces you to the basic features of the unit and
provides a quick-start orientation to the GPS 12XL.
Reference provides details about the advanced features and opera-
tions of the GPS 12XL by topic.
The Appendix section contains initialization instructions and items
with multiple listings, such as map datums, time offsets, and the
index.
Before getting started with your GPS, check to see that your GARMIN
GPS 12XL package includes the following items. If you are missing any
parts, please contact your dealer immediately.
Standard Package:
• GPS 12XL Unit • Owner’s Manual
• Wrist Strap • Quick Reference Guide
• Carrying Case • 4 AA Batteries
See your GARMIN dealer for accessories including our PC kit, swivel
mounts, external antennas, and power/data cables.
We at GARMIN hope the GPS 12XL will help you meet all of your
navigation needs and know it will become a valuable piece of your
outdoor gear.
i
INTRODUCTION
Packing List
GPS 12XL NEW Manual Rev A 2/6/98 3:17 PM Page 3
Caution
INTRODUCTION
ii
The GPS system is operated by the government of the United States,
which is solely responsible for its accuracy and maintenance. The system is
subject to changes which could affect the accuracy and performance of all
GPS equipment. Although the GPS 12XL is a precision electronic NAVigation
AID (NAVAID), any NAVAID can be misused or misinterpreted and, therefore,
become unsafe.
Use the GPS 12XL at your own risk. To reduce the risk of unsafe oper-
ation, carefully review and understand all aspects of this Operator’s Manual
and thoroughly practice operation using the simulator mode prior to actual
use. When in actual use, carefully compare indications from the GPS 12XL to
all available navigation sources including the information from other
NAVAIDs, visual sightings, maps, etc. For safety, always resolve any discrep-
ancies before continuing navigation.
NOTE: This device meets requirements for Part 15 of the FCC limits for
Class B digital devices for home or office use. It has been tested for compli-
ance with all necessary FCC standards. This equipment generates, uses, and
can radiate radio frequency energy and, if not installed and used in accor-
dance with the instructions, may cause harmful interference to radio commu-
nications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to
other equipment, which can be determined by turning the equipment off and
on, the user is encouraged to try and correct the interference by relocating the
equipment or connecting the equipment to a different circuit than the affected
equipment. Consult an authorized dealer or other qualified service technician
for additional help if these remedies do not correct the problem. Operation is
subject to the following conditions: (1) This device cannot cause harmful
interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation. The GPS 12XL
does not contain any user-serviceable parts. Repairs should only be made by
an authorizedservice center. Unauthorized repairs or modifications could
void your warranty and your authority to operate this device under Part 15
regulations.
GPS 12XL NEW Manual Rev A 2/6/98 3:17 PM Page 4
1
INTRODUCTION
Table of
Contents
SECTION ONE Introduction
Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
Battery & Remote Antenna Installation . . . . . . . . . . . . . . . . . . . . . . .4
Keypad Usage & Data Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Primary Page Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-7
SECTION TWO Getting Started
Power On & Marking a Position . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Position Page, Map Page, & Going To A Waypoint . . . . . . . . . . . . . .9
Compass Page & Cancelling A GOTO . . . . . . . . . . . . . . . . . . . . . .10
Clearing the Map, Screen Contrast, & Power Off . . . . . . . . . . . . . .11
SECTION THREE Reference
Satellite Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-13
Battery Level Indicator, Backlighting, and Emergency Erase . . . . . . .14
Position Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-16
Marking a Position & Position Averaging Function . . . . . . . . . . . . .17
Waypoint Pages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18-22
GOTO & Man Overboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
TracBack Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24-25
Creating and Using Routes . . . . . . . . . . . . . . . . . . . . . . . . . . . .26-30
Compass & Highway Pages . . . . . . . . . . . . . . . . . . . . . . . . . . .31-34
Map Page, Zooming, & Panning . . . . . . . . . . . . . . . . . . . . . . . .35-37
Map Options & Map Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Track Log Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
Find City Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
City Setup, Main Menu Page & Distance/Sun Calculations . . . . . . .41
Setup Menu & System Setup . . . . . . . . . . . . . . . . . . . . . . . . . .42-43
Navigation Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44-45
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
Interface Setup & DGPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47-48
Navigation Simulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
SECTION FOUR Appendices
Appendix A––Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . .50-51
Appendix B—Specifications & Wiring . . . . . . . . . . . . . . . . . . . .52-53
Appendix C—Messages and Time Offsets . . . . . . . . . . . . . . . . .54-55
Appendix D—Map Datums . . . . . . . . . . . . . . . . . . . . . . . . . . . .56-57
Appendix E––Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58-60
GPS 12XL NEW Manual Rev A 2/6/98 3:17 PM Page 1
Glossary
INTRODUCTION
2
The GPS 12XL is a powerful navigation tool that can guide you anywhere
in the world. To better understand its operation and capabilities, it may be
helpful to review the basic terms and concepts briefly explained below.
Other navigation and GPS definitions used in the manual are defined in the
appropriate reference sections of the manual.
Almanac Data
Satellite constellation information (including location and health of satel-
lites) that is transmitted to your receiver from every GPS satellite. Almanac data
must be acquired before GPS navigation can begin.
Bearing (BRG)
The compass direction from your position to a destination.
Course Made Good (CMG)
The bearing from the “active from” position (your starting point) to your
present position.
Crosstrack Error (XTK)
The distance you are off a desired course in either direction.
Desired Track (DTK)
The compass course between the “from” and “to” waypoints.
Differential GPS (DGPS)
An extension of the GPS system that uses land-based radio beacons to
transmit position corrections to GPS receivers.
Estimated Time of Arrival (ETA)
The time of day of your arrival at a destination.
Estimated Time Enroute (ETE)
The time left to your destination at your present speed.
GPS 12XL NEW Manual Rev A 2/6/98 3:17 PM Page 2
3
INTRODUCTION
Glossary
Grid
Coordinate system that projects the earth on a flat surface, using square
zones for position measurements. UTM/UPS and Maidenhead formats are grid
systems.
Ground Speed (SPD)
The velocity you are traveling relative to a ground position.
Latitude
The north/south measurement of position perpendicular to the earth’s
polar axis.
Longitude
An east/west measurement of position in relation to the Prime Meridian,
an imaginary circle that passes through the north and south poles.
Navigation
The process of traveling from one place to another and knowing where
you are in relation to your desired course.
Position
An exact, unique location based on a geographic coordinate system.
Track (TRK)
The direction of movement relative to a ground position.
Universal Transverse Mercator (UTM)
A grid coordinate system that projects global sections onto a flat surface to
measure position in specific zones.
Velocity Made Good (VMG)
The speed you are traveling in the direction of the destination.
Waypoint
A specific location saved in the receiver’s memory.
GPS 12XL NEW Manual Rev A 2/6/98 3:17 PM Page 3
Battery Installation
The GPS 12XL operates on 4 AA batteries (includ-
ed), which are installed at the base of the unit. These
batteries provide up to 12 hours of use.
To install the batteries:
1. Remove the battery cover by turning the thumb
loop at the bottom of the unit 1/4 turn counter-
clockwise.
2. Insert the batteries into position. The battery pole
you can still see should match the symbol (+ or –)
marked on the case.
3. Replace and secure the battery cover by turning
the thumb loop 1/4 turn clockwise.
Battery life varies due to a variety of factors,
including temperature and backlighting. You may
find that lithium batteries provide longer life in colder
conditions.
Battery
Installation
INTRODUCTION
4
Remote Antenna
Installation
An optional remote
antenna may be used
with the GPS 12XL.
The remote antenna
will improve the
receiving capabilities
of the unit by magni-
fying weaker signals
which the built-in
antenna may not be
able to use.
The remote
antenna is attached
by plugging it into
the connector on the
back of the unit (see
above).
Contact your
GARMIN dealer for
remote antennas and
accessories.
GPS 12XL NEW Manual Rev A 2/6/98 3:17 PM Page 4
5
DATA ENTRY
The arrow keypad is
used for all data entry.
Use the and
keys to select letters,
numbers, and menu
options; use the and
keys to move the cur-
sor forw a rd or back-
w a rd along the line.
Press to confirm
your entry.
INTRODUCTION
Keypad Usage &
Data Entry
Turns the unit on and off and
activates screen backlighting.
Scrolls through the main data
pages in sequence and returns
display from a submenu page
to a primary page.
Captures a position and dis-
plays the mark position page.
Displays GOTO page with
the waypoint highlighted for
GOTO operation. Pressing
GOTO twice activates MOB.
Confirms data entry and
activates highlighted fields
to allow data entry.
Returns display to a previous
page, or restores a data field’s
previous value.
Selects alphanumerical
characters and menu choices
and moves the field highlight
from field to field.
Moves the selected character
field and moves the field
highlight from field to field.
GPS 12XL NEW Manual Rev A 2/6/98 3:17 PM Page 5
Primary Pages
Before we start the tour, let’s briefly look at the five
primary information pages used for the GPS 12XL.
Switch between pages by pressing either the or
keys.
Satellite Page
The Satellite Page shows satellite positions and
signal strength. Satellite positions are displayed using
two circles and a center point. The outer circle shows
satellites on level with the horizon; the inner circle is
45º above the horizon; and the center point represents
satellites directly overhead. Knowing satellite positions
will show you the direction of any blocked signals.
The bottom of the page contains a row of signal
strength bars corresponding to each satellite being used.
Position Page
The Position Page shows you where you are, what
direction you’re heading and how fast you’re going.
The top of the page contains a compass tape which
is a graphic representation of your heading (or ‘track’).
Your track and speed are indicated immediately below.
The graphic compass tape reflects your actual
heading (track) only while you are moving.
The rest of the page shows your current position in
three dimensions: latitude, longitude, and altitude. A
trip odometer and 12/24-hour clock are also provided.
Primary Pages
INTRODUCTION
6
Satellite Page
The Satellite Page will
allow you to monitor
satellite signal reception
and strength.
!
Position Page
Satellite Position
Map Compass
Main Menu
GPS 12XL NEW Manual Rev A 2/6/98 3:17 PM Page 6
Map Page
The Map Page acts as a window. It allows you to
view your position, the “path” you have traveled over,
and nearby waypoints.
A diamond icon in the center of the screen repre-
sents your current position. As you move, you will see
a thin line—called a track log—appear along the path
you have just covered. Names of stored waypoints and
nearby cities can also be shown on the map.
The bottom corners of the map will always display
your current track and speed. When going to a way-
point, highlighting an on-screen waypoint, or using the
panning target crosshair, the corresponding distance
and bearing are shown at the top corners of the map.
The top of the screen contains the zoom, pan, and con-
figuration fields.
Navigation Page
A navigation page gives you steering guidance
when going to a waypoint. The GPS 12XL has two nav-
igation page choices: the Compass Page and the
Highway Page. The Compass Page is the default and
will be briefly explained here. The Highway Page is
covered on page 34.
The Compass Page shows the destination way-
point at the top of the page with the bearing (BRG) and
distance (DST) to the waypoint shown below. The cen-
ter of the page contains a compass ring and arrow to
show you the direction of the waypoint from the direc-
tion you are moving. The bottom of the page gives
your track (TRK), speed (SPD), and a selectable field
for estimated time to arrival (ETA), estimated time
enroute (ETE), course to steer (CTS), crosstrack error,
(XTK), velocity made good (VMG), or turn bearing
(TRN).
Main Menu Page
The last primary page is the Main Menu Page.
The Main Menu Page gives you access to the GPS
12XLs waypoint management, route, track log, and
setup features through a list of submenus.
7
Map Page
The Map Page shows
your progress on a mov-
ing map plotter and gives
a bird’s-eye-view of sur-
rounding waypoints and
cities.
INTRODUCTION
Primary Pages
Compass Page
The Compass Page is the
default navigation page
and will show you the
way to the waypoint from
the direction you are
moving.
GPS 12XL NEW Manual Rev A 2/6/98 3:17 PM Page 7
Getting Started Tour
Now that you’ve seen the primary pages, let’s get
started by taking a simple tour to show you the basics
about using your GPS 12XL. The tour assumes that
your unit has been turned on and that none of the fac-
tory settings ( units of measure, selectable fields, etc.)
have been changed. If these settings have been
changed, the pictures and descriptions you see in this
manual may not match what you see on your screen.
Turning the GPS 12XL On
1. Press until the receiver turns on.
The welcome page will appear while the unit con-
ducts a self test. Once testing is complete, the Database
Page will appear, followed by the Satellite Page. When
sufficient satellite signals have been acquired, the
Satellite Page will be replaced by the Position Page.
Marking a Position
GPS is really about marking and going to places
called waypoints. Before we can use our GPS 12XL to
guide us somewhere, we have to mark a position as a
waypoint. (Your GPS 12XL can hold up to 500 way-
points.)
To mark your present position:
1. Press the key. The mark position page will
appear, with a default three-digit name for the new
waypoint in the upper-left portion of the page.
To rename the waypoint:
1. Highlight the name field, and press .
2. Enter the waypoint name ‘HOME’, and press .
(See pg. 5 for data entry.) The waypoint symbol field
will become highlighted.
Each waypoint may also be assigned a custom way-
point symbol for easy waypoint recognition on the map.
To change the waypoint symbol:
1. Highlight the waypoint symbol field, and press .
2. Select the house symbol, and press .
3. Move the cursor to the ‘DONE?’ prompt, and press
.
Power On &
Marking a
Position
GETTING
STARTED
8
The welcome page will be
shown while the unit con-
ducts a self test. When
the Database Page
appears, press PAGE to
quickly move on to the
Satellite Page.
P ress the UP arrow to
move forward through the
alphabet or numbers and
the DOWN arrow to
move backward.
GPS 12XL NEW Manual Rev A 2/6/98 3:17 PM Page 8
Using the Position Page
Walk for 3-4 minutes and watch the Position Page.
The direction you are moving (track), your speed, trip
distance, and altitude are shown on the upper half of
the screen. The latitude and longitude of your position
are displayed in the middle of the page, with the time
of day shown below.
Let’s continue by moving to the next page:
1. Press .
Map Page
The next page is the Map Page. To ensure we can
see our entire trip on the map, lets change the map
scale from 0.2nm (default) to 1.0 nm.
1. Use the arrow keys to highlight the ‘ZM’ field at the
top left of the Map Page and press .
2. Press the arrow until ‘1nm’ is shown and press
.
The Map Page shows your present position as a
diamond icon in the center of the map. The house
symbol labeled ‘HOME’ is the waypoint you created
and the line connecting the two is your track log.
1. Now turn approximately 90º to your right and continue
walking for another 2-3 minutes. Notice how the dis-
play changes, always keeping the direction you are
moving at the top of the map (see right).
Going to a Waypoint
Once you’ve stored a waypoint in memory, you
may return to it by performing a GOTO. A GOTO is a
straight-line course from your present position to the
destination you’ve selected. Let’s navigate back to our
starting position, the HOME waypoint.
To select a GOTO destination:
1. Press .
2.Highlight the ‘HOME’ waypoint, and press .
You’ll notice that you’ll automatically return to the
Map Page, and a straight line will connect your current
position to the position of the destination waypoint.
Let’s continue by moving to the next page:
1. Press .
9
The Map Page displays
your present position as a
diamond icon and pro-
vides a real-time graphic
“ b re a d c rumb” display of
your track right on the
screen.
GETTING
STARTED
Position/Map
Pages & Going
To a Waypoint
The GOTO waypoint
page allows you to select
a destination from a
list of all available way-
points in the GPS 12XLs
memory.
GPS 12XL NEW Manual Rev A 2/6/98 3:17 PM Page 9
Compass Page
Whenever you select a destination waypoint, the
GPS 12XL provides graphic steering guidance with the
Compass Page (the default navigation page). The “com-
pass ring” in the middle of the page shows your course
over ground while you’re moving, with a pointer arrow
to the destination displayed in the center. The arrow
shows the direction of your destination relative to the
direction you are moving. For instance, if the arrow
points up, you are going directly to the waypoint. If the
arrow points any other direction (left, right, down, etc.),
turn toward the arrow until it points up. Then continue
in that direction.
The bearing and distance to a waypoint are dis-
played at the top of the screen, and your current track
and speed are shown below. The default ‘ETE’ field, at
the bottom of the screen, is a user-selectable field that
can provide a variety of navigation information. We’ll
cover more about that field in the reference section (see
page 32).
As you get close to ‘HOME’, you’ll be alerted to
press PAGE. The GPS 12XL will give you the message
“Arrival at HOME”. Once you’ve arrived, you’ll notice
the distance field will read 0.00.
Cancelling a GOTO
If you decide to stop navigating to the active way-
point, all you have to do is cancel the GOTO.
To cancel an active GOTO:
1. Press the key.
2. Use the arrow keypad to move the field highlight to the
‘CANCEL GOTO’ prompt at the bottom of the page and
press .
Compass Page
and Cancelling
a GOTO
GETTING
STARTED
10
The GPS 12XL will also
provide steering guidance
with a Highway Page.
To change the display
from the Compass Page,
press ENTER twice.
Once a GOTO is activat-
ed, the GPS 12XL pro-
vides steering guidance
until the GOTO is can-
celed. To cancel a GOTO,
highlight the cancel
prompt at the bottom of
the page and pre s s
ENTER.
Bearing to
Waypoint
Pointer to
Waypoint
Selectable Field
Distance to
Waypoint
Speed Over
Ground
Destination
Waypoint
Track Over
Ground
Graphic
Compass
GPS 12XL NEW Manual Rev A 2/6/98 3:17 PM Page 10
Clearing a Cluttered Map Display
After you’ve used the GPS12XL for a few trips, you
may find that your map display has become a bit messy
from keeping track of your every move. For practice,
let’s clean up the screen by clearing the track log (the
plot points left on the Map Page) we’ve just created
during the Getting Started tour.
1. Press or until the Map Page appears.
2. Highlight the ‘OPT’ field and press .
3. Highlight ‘Track Setup’ and press .
4. Highlight the ‘CLEARLOG?’ option and press .
The clear log confirmation page will appear.
5. Use the key to highlight the ‘Yes’ prompt.
6. Press to finish.
Adjusting Screen Contrast
You can access the GPS 12XLs contrast feature from
the Satellite Page.
To adjust the screen contrast:
1. Press or until the Satellite Page
appears.
2. Press or to adjust the level of contrast, and press
.
Screen Backlighting
Screen backlighting is available for nighttime use.
Activate backlighting by pressing the key briefly.
Backlighting will remain on for the time specified on
the system setup page (See page 43).
Turning the Receiver Off
You’ve now gone through the basic operation of
your new GPS receiver and probably know a little more
than you think about how it works. We encourage you
to experiment with the GPS12XL until it becomes an
extension of your own navigation skills. If you
encounter any problems using the unit or want to take
advantage of the GPS 12XLs more advanced features,
turn to the reference section.
To turn the GPS 12XL off:
1. Press and hold the key for 3 seconds.
11
Highlight the ‘CLEAR
LOG?’ prompt and press
ENTER to clear the track
log.
Note: With the ‘Wr a p ’
re c o rd option, once all
1024 points are used dur-
ing normal operation, the
oldest point will be contin-
uously deleted to make
room for the latest track
log point to be stored.
GETTING
STARTED
Clearing the
Map, Adjusting
Contrast, &
Power Off
Pressing the LEFT or
RIGHT arrows from the
Satellite Page will auto-
matically activate the
screen contrast bar.
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 11
Satellite Page
The GPS 12XLs Satellite Page displays the status of
various receiver functions. The status information will
help you understand what the GPS 12XL is doing at
any given time, and will tell you whether or not the
receiver has calculated a position fix.
Sky View and Signal Strength Bars
The sky view and signal strength bars give you an
indication of what satellites are visible to the receiver,
whether or not they are being used to calculate a posi-
tion fix, and the signal quality. The satellite sky view
shows a bird’s-eye-view of the position of each available
satellite relative to the unit’s last known position. The
outer circle represents the horizon (north up); the inner
circle is 45º above the horizon; and the center point is
directly overhead. You can use the sky view to help
determine if any satellites are being blocked, and
whether you have a current position fix (indicated by
‘2D NAV’ or ‘3D NAV’ in the status field). You can also
set the sky view to a track up configuration by changing
the ‘orientation’ option on the Map Page. (See pg. 38 for
setup instructions.)
When the receiver is looking for a particular satel-
lite, the corresponding signal strength bar will be blank
and the sky view indicator will be highlighted. Once the
receiver has found the satellite, a hollow signal strength
bar will appear, indicating that the satellite has been
found and the receiver is collecting data from it. The
satellite number in the sky view will no longer appear
highlighted. As soon as the GPS 12XL has collected the
necessary data to calculate a fix, the status field will
indicate a 2D or 3D status.
Satellite Page
REFERENCE
12
The GPS 12XL Satellite
Page will help you deter-
mine which satellites are
in view, and whether or
not any satellites are
being “shaded” or blocked
from receiving satellite
signals (see satellites 07
and 19 above).
By periodically monitor-
ing the signal strength
bars at the bottom of the
page and the north up
sky view, you will be able
to see how moving to
another area with a
clearer view of the sky
will improve satellite
reception and speed up
signal acquisition.
Battery
Indicator
Horizontal
Accuracy
Signal Strength
Indicators
Skyview
Display
Status
Field
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 12
Receiver Status
Receiver status is indicated at the top left of the
page, with the current horizontal accuracy (estimated
position error, in feet or meters) at the top right. The
status will be shown as one of the following conditions:
Searching— the GPS 12XL is looking for any
available satellites in view.
AutoLocate— the GPS 12XLis initializing and
collecting new almanac data. This process can take
5 minutes, depending on the satellites currently in
view.
Acquiring— the receiver is collecting data from
available satellites, but has not collected enough
data to calculate a 2D fix.
2D Nav (2D Navigation)— at least three satel-
lites with good geometry have been locked onto and
a 2-dimensional position fix (latitude and longitude)
is being calculated. ‘2D Diff’ will appear when you
are receiving DGPS corrections in 2D mode.
3D Nav (3D Navigation)— at least four satellites
with good geometry have been locked onto, and
your position is now being calculated in lati t u d e ,
longitude and altitude. ‘3D Diff’ will appear when you
are receiving DGPS corrections in 3D mode.
Poor Cvg (Poor GPS Coverage)— the receiver
i s n ’t tracking enough satellites for a 2D or 3D fix
due to bad satellite geometry.
Not Usable— the receiver is unusable, possibly
due to incorrect initialization or abnormal satellite
conditions. Turn the unit off and back on to reset,
and reinitialize the receiver if necessary.
Simulator— the receiver is in simulator mode.
EZinit Option Prompt
The Satellite Page also provides access to the EZinit
prompt whenever a position fix has not been calculated.
(The unit must be in searching, AutoLocate, acquiring,
simulator, or poor coverage mode.) This allows you to
reinitialize the unit (see Appendix A), and is useful if
you have traveled over 500 miles with the receiver off
and must initialize your new position. (The EZinit
prompt will automatically appear if the receiver needs
to be initialized. The prompt may also appear during
normal use if the antenna is shaded or the unit is oper-
ated indoors.)
13
The signal strength bars at
the bottom of the page will
not appear until the GPS
12XL has found the satel-
lites indicated at the bot-
tom of the screen.
REFERENCE
Receiver Status
& EZinit
If you travel more than
500 miles with the receiv-
er off, reinitialize the unit
to your new position by
using the EZinit feature.
To access EZinit, pre s s
ENTER from the Satellite
Page before any satellites
are acquired.
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 13
Battery Level Indicator
The Satellite Page also features a battery level indi-
cator, located to the left of the sky view, which displays
the strength of the unit’s batteries. The battery indicator
will not appear if the receiver is using external power.
The battery level indicator is calibrated for alka -
line batteries. Voltage differences will display
Ni-Cad and lithium batteries differently . No
other receiver functions are affected.
The GPS 12XL features an internal lithium battery
that will maintain the unit’s memory when the receiver
is not running off batteries or external power.
Backlighting Bulb Icon
The GPS 12XL features full-screen backlighting.
Activate the backlight by pressing the key briefly.
Note: A bulb icon will appear on the Satellite Page
when backlighting is turned on.
Emergency Erase Function
You may erase the GPS 12XLs memory in four quick
steps. This will cause all stored data to be deleted,
including: routes, waypoints, and the track log.
To erase all stored data:
1. Ensure that the GPS 12XL is turned off.
2. While holding down the key, hold down the
key to turn the unit on. A warning message will appear
with “Yes?” highlighted, and ask you to confirm your
selection.
3. If you do not wish to erase all stored data, press
and to cancel the emergency erase.
4. If you do wish to complete the emergency erase, press
to confirm.
Battery Level,
Backlighting &
Emergency Erase
REFERENCE
14
When backlighting is on, a
bulb icon will appear on
the Satellite Page.
Use the icon to determine
if backlighting is turned
on during daylight hours.
Upon activating the
E m e rgency Erase
Function, you will be
asked to confirm your
decision.
!
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 14
Position Page
The second page in the GPS 12XLs primary page
sequence is the Position Page. This page shows you
where you are, what direction you’re heading, and how
fast you’re going, and it’s most useful when you are trav-
eling without an active destination waypoint. The graph-
ic heading display at the top of the page indicates the
direction you’re heading (track) while you’re moving.
Directly below this display are the track, speed, and
trip odometer (default) fields. Track is the compass
direction representing your course over the ground, or
the direction you’re moving. The lower left-hand cor-
ner of the page shows your current latitude and longi-
tude in degrees and minutes. The GPS 12XL uses this
basic information to mark exact positions as waypoints,
which help guide you from one place to another. The
lower right-hand corner of the page contains the alti-
tude field (default). Below that field is a 12- or 24-hour
clock.
Both the trip odometer and the altitude fields are
user selectable, and both offer a trip odometer, trip
timer, and elapsed time. This way, you can always be
sure of viewing this information regardless of the
option you’ve selected for the other user-selectable
field.
The following user-selectable options are available
on the Position Page:
Trip Odometer (TRIP)— total distance
traveled since last reset.
Trip Timer (TTIME)— total (cumulative)
time in which a ground speed has been
maintained since last reset.
Elapsed Time (ELPSD)— total time in
hours and minutes since last reset.
Average Speed (AVSPD)— average speed
traveled since last reset.
Maximum Speed (MXSPD)— maximum
speed traveled since last reset.
Altitude (ALT)— vertical distance above
mean sea level.
15
The speed and track dis-
played on the Position
Page may fluctuate at
slow speeds (or when
y o u ’ re standing still)
because of position errors
caused by DOD-imposed
Selective Availability.
REFERENCE
Position Page
The user selectable fields
on the Position Page give
you a variety of informa-
tion to choose from.
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 15
To reset timer, speed measurement, or odometer:
1. Highlight the user-selectable field, and press .
‘Reset’ will appear as a selectable option (see left).
2. Press to confirm or to exit.
The trip odometer, trip timer, and average speed
fields are linked. Resetting one of these options in a
user-selectable field will automatically reset the corre-
sponding data in the other. This ensures that informa-
tion shown in these fields reflects your current trip.
Maximum Speed Field
To obtain the most accurate reading of average
speed, keep in mind that due to the sensitivity of the
GPS 12XLs antenna, your maximum speed value may
include the effects of rapid movement, such as swinging
your arm while holding the unit.
To reset the maximum speed field:
1. Highlight the ‘MXSPD’ field, and press .
2. Press to confirm the ‘RESET?’ prompt.
Altitude Field
When the GPS 12XL is acquiring satellites or navi-
gating in the 2D mode, the last known altitude is used
to compute your position. You may also manually enter
your altitude for greater accuracy. In cases where the
GPS 12XL has 2D coverage, entering your approximate
altitude will enable the receiver to determine a more
accurate position fix.
To enter an altitude:
1. Highlight the ‘ALT’ field, and press .
2. Enter a value, and press .
Maximum Speed
& Altitude
Fields
REFERENCE
16
Resetting the trip odome-
ter will erase the previous
mileage and set the
odometer to zero. Average
speed, maximum speed
and timer readouts will
also be reset to zero.
You may enter a known
altitude to assist the GPS
12XL in establishing a
more accurate 2D position
fix.
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 16
Marking a Position
The GPS 12XL allows you to mark and store up to
500 positions as waypoints. A waypoint can be entered
by taking an instant electronic fix, by manually enter-
ing coordinates (pg. 20), or by using the bearing and
distance to a known position (pg. 20).
To mark your present position:
1. Press . The mark position page will appear,
showing the captured position and a default three-
digit name.
2. To save a default name and symbol, press to
confirm the ‘SAVE?’ prompt.
Position Averaging Function
The GPS 12XL positioning averaging function will
help reduce the effects of selective availability upon
position error when marking a waypoint, providing
more accurate saved positions.
1. After you have pressed the key, highlight the
‘AVERAGE?’ field and press . The Figure of
Merit (FOM) field will display a value reflecting esti-
mated accuracy of the averaged position. Note: As
the GPS 12XL calculates the FOM, it will rapidly
change initially then begin to stabilize over time.
2. The unit will continue averaging until you have high-
lighted ‘SAVE?’ and pressed .
To enter a different waypoint name:
1. Highlight the waypoint name field, and press .
2. Make the appropriate changes, and press .
3. Highlight ‘SAVE?’, and press .
Note: To enter a different waypoint symbol or com-
ment, see pg. 21.
To add this waypoint to a route:
1. Highlight the ‘Add to route number’ field, and press
.
2. Enter a route number, press to confirm the
route number, and again to save the waypoint.
The waypoint will be added to the end of the selected
route—after any other waypoints already in the route.
17
After initiating the posi-
tion averaging function, a
Figure of Merit value will
be displayed, and the
‘ S AVE?’ field will auto-
matically be highlighted.
REFERENCE
Position
Averaging
The GPS 12XL will save
new waypoints with a
default three-digit name.
To add the waypoint to a
route, enter the desire d
route number, highlight
‘ S AVE?’ and pre s s
ENTER.
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 17
Waypoint Pages
The GPS 12XL has three waypoint pages that let you
quickly manage up to 500 waypoints. These pages—
nearest waypoints, waypoint list, and waypoint defini-
tion—can be accessed through the Main Menu Page.
To select a waypoint page:
1. Access the Main Menu, and highlight a waypoint page
option: ‘Waypoint’, ‘Waypoint List’ or ‘Nearest Wpts’.
2. Press .
Nearest Waypoints Page
The nearest waypoints page shows the nine nearest
waypoints that are within 100 miles of your present
position, with the bearing and distance noted for each
waypoint. This page will also let you retrieve a waypoint
definition page or GOTO a selected waypoint right from
the list.
To review the waypoint definition page of a select-
ed waypoint:
1. Highlight the desired waypoint.
2. Press .
To return to the nearest waypoint page:
1. Highlight ‘DONE?’.
2. Press .
To go to a highlighted list waypoint:
1. Highlight the desired waypoint, and press .
2. Press .
Waypoint List Page
The waypoint list page provides a complete list of all
waypoints currently stored in the GPS 12XL and their
respective waypoint symbols. The total number of
empty and used waypoint locations in memory is also
indicated. From the waypoint list page, you can retrieve
a waypoint definition page, delete all user-defined way-
points, delete waypoints by symbol, or review and per-
form a GOTO to a selected waypoint.
To delete all user-defined waypoints:
1. Highlight ‘DELETE WPTS?’ and press .
2. Highlight ‘DELETE ALL’ and press .
3. Highlight the ‘YES’ prompt and press .
Nearest
Waypoints &
Waypoint List
REFERENCE
18
To select a waypoint sub-
menu, highlight the
desired option and press
ENTER.
Nearest Waypoints
Page
The compass heading
(BRG) and distance
(DST) to the nine nearest
waypoints are updated
continuously.
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 18
Waypoint List Page (continued)
To delete waypoints by symbol:
1. Follow step one from the previous page, under ‘delete
all user-defined waypoints’.
2. Select ‘DELETE BY SYMBOL’ and press .
3. Select the symbol corresponding to the waypoints
you wish to delete. Press .
4. Press to confirm the ‘DONE’ prompt, highlight
the ‘YES?’ prompt, and press .
Note: This feature is handy for deleting temporary
waypoints created by the TracBack function.
Proximity Waypoints
The GPS 12XLs proximity waypoint function warns
you when you are getting too close to hazardous way-
points. This function allows you to create up to nine
proximity waypoints and designate an alarm circle for
each waypoint. If you enter this circle, a warning mes-
sage will alert you.
To enter a proximity waypoint from the Main
Main Menu Page:
1. Highlight ‘PROXIMITY WPTS’ and press .
2. Highlight the first empty waypoint field and press
.
3. Use the or key to scroll through stored
waypoints until the desired waypoint appears.
4. Press . The distance (DST) field will be auto-
matically highlighted. Press and enter the
desired distance.
5.Press the key.
To review or remove a proximity waypoint:
1. Use and to select a proximity waypoint and
press .
2. Highlight ‘REVIEW?’ or ‘REMOVE?’ and press .
If ‘REVIEW?’ is chosen, the waypoint page will
appear, and you may make any changes to the selected
waypoint. If ‘REMOVE?’ is chosen, the proximity way-
point will be removed from the list. Press or
to return to the Main Menu Page.
19
Deleting waypoints by
symbol enables you to
delete a specific group of
waypoints without losing
all other waypoints.
REFERENCE
Waypoint List &
Proximity
Waypoints
Quickly edit or delete
p roximity waypoints by
highlighting the waypoint
name and pre s s i n g
ENTER.
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 19
Waypoint Definition Page
The waypoint definition page lets you create new
waypoints manually or review and edit an existing way-
point’s coordinates, symbols, and comments. It is also
used to delete an individual waypoint from memory
(see pg. 22). To create a new waypoint manually, you’ll
need to know its position coordinates or its approxi-
mate distance and bearing from an existing waypoint.
To create a waypoint by entering coordinates:
1. From the waypoint definition page, highlight ‘NEW?’,
and press .
2. Enter a waypoint name, and press .
3. Press to select a waypoint symbol, make your
selection, and press .
4. Highlight the ‘DONE?’ prompt, and press to
return to the waypoint page.
5. Highlight the position field, enter your position using
the arrow keys, and press .
6. Press to confirm the ‘DONE?’ prompt.
Reference Waypoints
To create a new waypoint manually without know-
ing its position coordinates, you’ll need to enter its
bearing and distance from an existing waypoint or your
present position.
To create a new waypoint by referencing a stored
waypoint:
1. From the waypoint definition page, highlight ‘NEW?’,
and press .
2. Enter a waypoint name, and press .
Waypoint
Definition &
Reference
Waypoints
REFERENCE
20
The GPS 12XLs advanced
waypoint planning fea-
tures allow you to create
new waypoints and prac-
tice navigation without
ever setting foot outside.
If you create a new way-
point by entering coordi-
nates from a map, you
may want to re-mark the
waypoint’s exact position
once you get there.
To re-define an existing
waypoint’s position coor-
dinates from the waypoint
definition page, simply
highlight the DST field
and press ENTER. Use the
LEFT arrow key to set the
distance to 0.00, and press
ENTER to confirm.
The old coordinates will be
replaced by the coord i -
nates of your present posi-
t i o n (you must have a
valid 2D or 3D position
fix and the reference way-
point name field must be
blank).
Waypoint
Name
Reference
Waypoint
(leave blank for
present position)
Distance from
Reference
Waypoint
Position
Coordinates
Bearing from
Reference
Waypoint
Function Prompts
Waypoint Comment
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 20
Reference Waypoints (cont.)
3. Highlight the ‘REF’ field, and press .
4. Enter a reference waypoint name (or leave the field
blank to use your present position), and press .
5. Repeat the preceding two steps to enter the bearing
(‘BRG’ field) and distance (‘DST’ field) of your new
waypoint fromthe reference waypoint.
6. Press to confirm the ‘DONE?’ prompt.
Waypoint Symbols
The GPS 12XL allows you to select one of 16 sym-
bols for each waypoint for easy recognition on the map
display. From the symbol page, you may also select
how the waypoint appears on the map.
To select a waypoint symbol:
1. Highlight the symbol field on the waypoint definition
page, and press .
2. Use the arrow keypad to select the desired symbol,
and press .
3. The cursor will move to the display field, where you
can select which waypoint information is displayed
on the map.
4. Press , and select one of the following display
options: ‘NAME WITH SYMBOL’, ‘SYMBOL ONLY,’ or
‘COMMENT WITH SYMBOL’.
5. Press to confirm your selection, and
again to confirm the ‘DONE?’ prompt.
Waypoint Comments
Each waypoint stored in the GPS 12XL has a user-
definable 16-character comment field. The default
comment is the UTC (or Greenwich Mean Time) date
and time of the waypoint’s creation.
To change or add a comment:
1. Highlight the comment field.
2. Press .
Note: You can clear the comment field by press-
ing the left side of the rocker keypad.
3. Enter the desired comment, using the arrow keys.
4. Press .
21
Waypoint symbols enable
you to instantly identify a
waypoint when it appears
on the map page.
REFERENCE
Waypoint
Symbols &
Comments
The waypoint comment
field will automatically
assign the date and time of
creation to the waypoint
comment field. You may
enter a 16-character user
comment at any time.
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 21
Renaming and Deleting Waypoints
The rename and delete function fields are located
along the bottom left side of the waypoint definition
page.
To rename a stored waypoint:
1. Highlight ‘RENAME?’, and press .
2. Enter the new waypoint name, and press .
3. Press to confirm the ‘Yes?’ prompt.
To delete a stored waypoint:
1. Highlight ‘DELETE?’, and press .
2. Highlight the ‘Yes?’ prompt, and press .
Note: To delete a waypoint that’s part of a route,
first remove the waypoint from the route (see pg. 30),
and then delete it. If you attempt to delete a waypoint
that’s part of a route, you’ll be given a “Route Waypoint
Can’t be Deleted” message.
Scanning Waypoints
As you manually enter a waypoint’s name, the GPS
12XLs waypoint scanning feature will automatically dis-
play the first numerical or alphabetical match of the
character you have entered to that point. This helps
eliminate the need to always enter a waypoint’s com-
plete name.
To scan waypoints from a waypoint field:
1. Highlight the waypoint name field, and press .
2. Press the left side of the keypad to clear the name
field.
3. Scroll through the waypoints.
Note: The GPS 12XLs waypoint scanning feature
will offer the first waypoint that matches the character
or characters you have entered up to that point. If you
have more than one waypoint that begins with the same
letter or number, move to the next character position as
needed.
4. When you find the desired waypoint, press .
Rename, Delete
& Scan
Waypoints
REFERENCE
22
You may wish to quickly
save waypoints by press-
ing MARK and then
ENTER, thus assigning a
default name. You may
then rename the waypoint
at a later date. Any way-
point may be renamed at
any time.
Scanning waypoints from
the waypoint definition
page gives you instant
access to a specific way-
point’s information.
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 22
Selecting a GOTO Destination
The GPS 12XL provides four ways to navigate to a
destination: GOTO, MOB, TracBack, and route naviga-
tion. The most basic method of selecting a destination
is the GOTO function, which lets you choose any
stored waypoint as the destination and quickly sets a
direct course from your present position.
To activate the GOTO function:
1. Press .
2. Select the waypoint you want to navigate to, and
press .
Once a GOTO waypoint has been activated, the
Compass Page or Highway Page will provide steering
guidance to the destination until either the GOTO is
cancelled or the unit has resumed navigating the active
route (see pg 30).
To cancel an active GOTO:
1. Press the key.
2. Highlight ‘CANCELGOTO?’, and press .
Selecting a City as Your Destination
The GPS 12XL also features a built-in database of
city locations. You can quickly select any one of these
locations as your destination waypoint, using the Find
City feature. Once selected, the GPS 12XL will create a
waypoint named after the city and place it in user way-
point memory.
To select a city as your destination:
1. Highlight ‘FIND CITY?’ and press . Then follow
the GOTO steps for the find city page (described on
pages 40-42).
Man Overboard Function
The GPS 12XLs man overboard function (MOB) lets
you simultaneously mark and set a course to a position
for quick response to passing positions.
To activate the MOB mode:
1. Press twice. The GOTO waypoint page will
appear with ‘MOB’ selected.
2 Press to begin MOB navigation.
The GPS 12XL will now guide you to the MOB way-
point until the MOB GOTO is cancelled. If you want to
save the MOB waypoint, be sure to rename it because it
will be overwritten the next time a MOB is activated.
23
Select a destination way-
point from the GOTO
waypoint list.
REFERENCE
GOTO & MOB
Functions
Once the MOB mode has
been activated, steering
guidance will be provided
by the Compass or
Highway Page. Activating
another MOB will over-
write the previous MOB
waypoint.
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 23
TracBack Navigation
GARMIN’s patented TracBack feature allows you to
quickly retrace your path using the track log automati-
cally stored in the receiver. This feature eliminates the
need to mark waypoints along the way and manually
create and activate a route back to where you began
your trip. Three track recording options are available:
Off—no plot will be recorded.
Fill—a track log will be recorded until track mem-
ory is full.
Wrap—a track log will be continuously recorded,
wrapping through the available memory (replacing
the oldest data with new data).
To select a track log option:
1. Highlight ‘OPT’ field on the map page and press .
2. Highlight ‘TRACK SETUP’ and press .
3. Highlight the ‘RECORD’ field, press , select an
option, and press .
Once a TracBack route is activated, it will lead you
back to the oldest track log point stored in memory, so
it’s usually a good idea to clear the existing track log at
the start of each trip.
To clear the track log and define a starting point
for a TracBack route:
1. From the Map Page, press , highlight the ‘TRACK
SETUP’ option, and press .
2. Highlight ‘CLEARLOG?’, press , highlight ‘Yes?’,
and press .
To activate a TracBack route:
1. Press , highlight ‘TRACBACK?’, and press .
Once the TracBack function has been activated, the
GPS 12XL will take the track log currently stored in
memory and divide it into segments called legs. Up to
30 temporary waypoints will be created to mark the
most significant features of the track log in order to
duplicate your exact path as closely as possible. These
points will be indicated by ‘T###’ (e.g., ‘T001’) on the
waypoint list, and by a ‘T’ symbol on the Map Page.
The active route page will appear, showing a route
from your present position to the oldest track log point
in memory. Steering guidance to each waypoint will be
p rovided back to the starting point of your track log. Note:
You may delete a TracBack waypoint from a route, but
only if the route is not active.
TracBack
REFERENCE
24
WARNING:
Setting the track recording
to OFFwill also disable
the TracBack function.
Highlight ‘TRACBACK?’
and press ENTER to begin
TracBack navigation. A
message box will appear
while the GPS 12XL ana-
lyzes the data and creates
the TracBack route.
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 24
Tips On the TracBack Feature
Always clear your track log at the exact point that
you want to go back to (trail head, truck, etc.).
The ‘RECORD’ option on the track log setup page
must be set to ‘WRAP’ or ‘FILL’.
There must be at least two track log points stored
in memory to create a TracBack route.
If there is not enough available memory to add
more waypoints and create a TracBack route, you
will be alerted with a ‘waypoint memory full’
message, and the receiver will use any available
waypoints to create a TracBack route with an
emphasis on the track log closest to the destina-
tion (the oldest track log point in memory).
If the ‘METHOD’ option on the track log setup
page is set to a time interval, the TracBack route
may not follow your exact path. (Keeping the cri-
teria set to automatic will always provide the
most detailed TracBack route.)
If the receiver is turned off or you lose satellite
coverage during your trip, the TracBack route will
simply draw a straight line between any point
where coverage was lost and where it resumed.
If the changes in direction and distance of your
track log are complex, 30 waypoints may not be
enough to accurately mark your exact path. The
receiver will then assign the 30 waypoints to the
most significant points of your track, and simplify
segments with fewer changes in direction.
To save a TracBack route, copy route 0 to an open
storage route before activating another TracBack.
Activating another TracBack or storage route will
overwrite the existing TracBack route.
Whenever a TracBack route is activated, the
receiver will automatically erase any temporary
waypoints (‘T###’) that are not contained in
routes 1-19. If there are temporary waypoints
stored in routes 1-19, the receiver will create any
new temporary waypoints using the first three-
digit number available. (You can also quickly
delete all temporary TracBack waypoints in mem-
ory by using the ‘DELETE BY SYMBOL’ method
described on pg. 19.)
25
The TracBack feature will
navigate your track log
back to the oldest point in
the receiver’s memory.
REFERENCE
TracBack
The track log will be
divided into segments with
t e m p o r a ry waypoints to
create a route back to the
beginning of the track log.
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 25
Route Navigation
The last form of navigating to a destination with the
GPS 12XL is by creating a user-defined route. The route
navigation feature lets you plan and navigate a course
from one place to another using a set of pre-defined
waypoints. Routes are often used when it’s not practical,
safe, or possible to navigate a direct course to a particu-
lar destination (e.g., through a body of water or impass-
able terrain).
Routes are broken down and navigated in smaller
segments called “legs”. The waypoint you are going to
in a leg is called the “active to” waypoint and the way-
point immediately behind you is called the “active from”
waypoint. The line between the “active to” and the
“active from” waypoint is called the “active leg”.
Whenever you activate a route with the GPS 12XL,
it will automatically select the route leg closest to your
position as the active leg. As you pass each waypoint in
the route, the receiver will automatically sequence and
select the next waypoint as the “active to” waypoint.
Routes
REFERENCE
26
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 26
Route Definition Page
The last form of navigating to a destination with
the GPS 12XL is by creating a user-defined route. The
GPS 12XL lets you create and store up to 20 routes of
30 waypoints each.
Routes can be copied, cleared, inverted, and acti-
vated through the route definition page.
To select the route definition page:
1. Highlight ‘ROUTES’ from the Main Menu Page, and
press .
The ‘route number’ field is displayed at the top of
the page, with a 16-character ‘user comment’ field
directly below. If no user comment is entered, the field
displays the first and last waypoint in the route.
To edit the route comment:
1. Highlight the comment field and press .
2. Use the arrow keys to enter a new comment and press
.
The waypoint list along the left side of the page
accepts up to 30 waypoints for each route, with fields
for desired track and distance between legs. The total
route distance is indicated below the waypoint list.
The bottom of the route definition page features
several ‘function’ fields which let you copy, clear, invert,
or activate the displayed route. Routes 1-19 are used as
storage routes, with route 0 always serving as the active
route you are navigating. If you want to save a route
that’s currently in route 0, be sure to copy it to another
open route, as it will be overwritten by the next route
activation.
27
Routes enable you to store
groups of frequently used
waypoints together and
use this information for
navigation guidance.
REFERENCE
Route Definition
Page
Enter each waypoint in
the order you would like to
navigate them. If you
enter a waypoint not
stored in memory, you’ll
need to define the position
on the waypoint definition
page.
Comment
Field
Desired
Track of Leg
Total
Route
Distance
Route
Number
Copy Field
Function Prompts
Leg Distance
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 27
Creating and Navigating Routes
To create a route from the route definition page:
1. Highlight the route number field, and press .
2. Enter a route number, and press . (Select an
empty route—without any waypoints listed—when
creating a new route.)
3. Enter the first waypoint of your route, and press
. As you continue entering the rest of your way-
points, the list will automatically scroll down.
4. To change the route comment (automatically assigned
to the route based upon the starting and final destina-
tion waypoints), highlight the route comment field and
press . Enter the new comment and press .
Whenever you activate a route, it will automatically
select the route leg closest to your position as the active
leg. As you pass each waypoint in the route, the receiver
will automatically sequence and select the next way-
point as the ‘active to’ waypoint.
Activating and Inverting Routes
After a route has been entered, it can be either acti-
vated in sequence or inverted from the route definition
page. The process of activating or inverting a stored
route takes a storage route (routes 1-19) and copies it
into the active route (route 0) for navigation. The stor-
age route is no longer needed and will be retained in its
original format under its existing route number.
This system allows you to have an active route that
you may edit during navigation and save as an entirely
new route from the original. You will have to copy the
active route to an unused storage route to save it, since
new route or TracBack activation overwrites route 0.
To activate a route:
1. From the route definition page, highlight the route
number field and press .
2. Enter the route number to be activated, and press
.
3. Highlight ‘ACT?’, and press .
To activate a route in inverted order:
1. Follow the steps above, but select ‘INV?’, and press
.
Using Routes
REFERENCE
28
You may use up to 16
characters to custom
name a route. The default
name will be the first and
last waypoint in the route.
To activate a route, high-
light the ‘ACT?’ prompt
and press ENTER.
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 28
Active Route Page
Once a route has been activated, the active route
page will display the waypoint sequence of your route
with the estimated time enroute (ETE) at your present
speed and the distance to each waypoint. As long as
you are navigating an active route, the active route page
will become part of the main page sequence of the unit.
The active route page will also allow you to change the
‘ETE’ field to display desired track (DTK) or estimated
time of arrival (ETA) for each leg. You can also clear or
invert the active route.
To display DTK or ETA for each leg:
1. Highlight ‘ETE’, and press .
2. Select ‘DTK’ or ‘ETA’, and press .
The active route page also allows you to clear (stop
navigating) or invert the active route without using the
route definition page.
To invert a route from the active route page:
1. Highlight ‘INVERT?’, and press .
To stop route navigation:
1. Select ‘CLEAR?’, and press .
Copying and Clearing Routes
The route definition page is also used to copy a
route to another route number. This feature is useful
when you make changes to the active route (or create a
TracBack route) and want to save the route in its modi-
fied form for future use.
To copy a route:
1. Highlight the route number field, and press .
2. Select the route number to be copied, and press .
3. Highlight the ‘COPY TO’ field, and press .
4. Scroll through the available routes and select a desti-
nation route number. (Only open routes will be avail-
able.) Press to copy the route.
To clear a route from memory:
1. Highlight the route number field, and press .
2. Select the desired route number, and press .
3. Select ‘CLR?’, and press .
4. Highlight ‘Yes?’, and press .
29
Active Route Page
Whenever you have an
active route, the active
route page will appear in
the primary page
sequence after the
Compass/Highway Page.
REFERENCE
Active Route,
Copying, &
Clearing
To copy a route, select an
open storage route in the
‘Copy To’ field and press
ENTER. Only empty stor-
age route numbers will be
offered in the ‘Copy To’
field.
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 29
Editing Routes
A route can be edited any time after its creation.
To edit a route from the active route page or
the route definition page:
1. Select the waypoint you want to edit, and press .
An on-screen menu of editing choices will appear,
with options for reviewing, inserting, deleting, or
changing the waypoint field highlighted. This field con-
tains the following options:
• Review?— displays the waypoint definition page
for the selected waypoint
• Insert?— adds a new waypoint directly in front
of the selected waypoint
• Remove?— deletes the selected waypoint from
the route
• Change?— allows you to replace the selected
waypoint with a new waypoint
Note: Editing the original storage route will not
affect route 0. If you want to save an edited version of
route 0, save it to an open storage route.
On-Route GOTOs
At the beginning of this section, we mentioned that
the GPS 12XL will automatically select the route leg
closest to your position as the active leg. This will give
you steering guidance to the desired track (desired
course) of the active leg. Note that the first waypoint
selected as the destination waypoint will be along the
route leg closest to your present position. This may
mean you’re not navigating to the first waypoint in the
active route—you may even be navigating to the last.
You can manually navigate a route out of sequence at
any time (bypassing one or more interim waypoints) by
perform an “on-route GOTO” from the active route page.
To perform an “on-route GOTO” from the active
route page:
1. Highlight the desired route waypoint, and press .
2. Once the GOTO waypoint page appears with the way-
point highlighted, press .
Note that after you reach the on-route GOTO way-
point, the GPS 12XL will automatically resume navigat-
ing the rest of the route in sequence.
Editing Routes
& On-Route
GOTO’s
REFERENCE
30
Use the on-screen menu to
select the desired editing
function. The on-scre e n
menu is displayed by
highlighting a route
waypoint and pre s s i n g
ENTER..
You can ‘skip ahead’ and
bypass one or more legs of
the route by highlighting a
waypoint further along
the route, pressing GOTO
and ENTER.
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 30
Selecting a Navigation Page
Once you’ve selected a GOTO destination or acti-
vated a TracBack, MOB, or route; the GPS 12XL will
provide graphic steering guidance to the destination
with one of two navigation pages:
The Compass Page (default) provides a direc-
tional pointer indicating the bearing to your desti-
nation and a rotating compass ring which shows
your direction of travel (track) at the top of the
ring. The Compass Page provides better guidance
for car travel, hiking, or biking; where straight-
line navigation is often not possible.
The Highway Page provides a graphic highway
display that shows your movement relative to the
desired course, with an emphasis on your cross
track error ( the distance and direction you are off
course). The cross track error (XTK) is depicted
on a course deviation indicator (CDI) (see pg. 34).
The Highway Page is well-suited for boating or
some types of off-road recreation where straight
line navigation is typically possible and maintain-
ing a specified course is desirable.
Both pages provide a digital display of the bearing
and distance to the destination, and your current speed
and track over the ground. You can switch to either
Navigation Page at any time.
To select either Navigation Page:
1. Press from the existing Navigation Page, and
again to change the page.
31
To switch the navigation
page to the Compass
Page, press ENTER twice.
REFERENCE
Navigation
Pages
To switch the navigation
page to the Highway Page,
press ENTER twice.
Compass Page
Highway Page
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 31
Selecting a Navigation Page (cont.)
The ‘ETE’ field, located at bottom center on both
pages, is a user-selectable field that allows you to dis-
play a variety of navigation values for your trip.
To access the user-selectable field:
1. Highlight ‘ETE’, and press .
2. Use the keypad to scroll through the possible options.
The following data options are available for the
Navigation Pages:
Estimated Time Enroute (ETE)— the estimated
time remaining to reach your destination based on
your present speed and track.
Estimated Time of Arrival (ETA)— the estimat-
ed time of day at which you will arrive at your desti-
nation based on current ground speed and track.
Course to Steer (CTS)— the recommended
course to follow in order to reduce cross track error
and stay on course. Provides the most efficient
heading to get back on course and proceed along
your route or GOTO.
Crosstrack Error (XTK)— the distance you are
off the desired course in either direction, left or
right. This field will give you a digital readout of the
data depicted by the CDI.
Velocity Made Good (VMG)— the speed you
are closing in on a destination along the desired
course. Also referred to as the ‘vector velocity’ to
your destination.
Turn (TRN)— the angle difference between the
bearing to your destination and your current track.
‘L’ indicates you should turn left, ‘R’ indicates you
should turn right.
Navigation
Pages
REFERENCE
32
The user selectable field
allows you to customize
the navigation pages,
selecting the desired data
readout.
The turn option shows the
number of degrees you
need to turn (left or right)
to head directly to your
destination.
Track Over
Ground
User-Selectable
Field
Distance to
Waypoint
Graphic
Compass
Ring
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 32
Using the Compass Page
The Compass Page provides better steering guid-
ance than the Highway Page for travel at slower speeds
(e.g., walking), travel with many directional changes
and when it’s not necessary to follow an exact course.
The bearing (BRG) and distance (DST) to the way-
point are displayed at the top of the page, below the
destination waypoint name. The distance displayed is
the straight-line distance from your present position to
the destination waypoint. The bearing indicates the
exact compass heading from you to the destination.
The middle of the page features a rotating “compass
ring” that shows your course over ground while you
are moving (track indicated at the top of the ring), with
a pointer arrow to the destination displayed in the cen-
ter. The arrow shows the direction of your destination
from the direction you are moving. For instance, if the
arrow points up, you are going directly to the way-
point. If the arrow points any direction (left, right,
down, etc.), turn toward the arrow until it points up.
Then continue in that direction.
The bottom of the page shows your track (TRK),
speed (SPD), and a user-selectable field for ETE, ETA,
CTS, XTK, VMG, or TRN.
When you are one minute away from your destina-
tion (based on your current speed and track over
ground), the GPS 12XL will alert you with a flashing
on-screen message box.
33
In this example, the
Compass Page indicates
that you are traveling
west (261 degrees) and
the destination waypoint
is to the northwest (291
d e g rees). Tu rn right 30
degrees and continue on.
REFERENCE
Compass Page
In this example, the
Compass Page indicates
that you are traveling
north (350 degrees) and
the destination waypoint
is to the northwest (291
degrees). Turn left 59
degrees and continue on
to reach your destination.
Pointer to
Waypoint
Speed Over
Ground
Destination
Waypoint
Bearing to
Waypoint
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 33
Using the Highway Page
The GPS 12XLs Highway Page provides graphic
steering guidance to a destination waypoint, with a
greater emphasis on the straight-line desired course and
the distance and direction you are off course. The bear-
ing and distance to a waypoint—along with your cur-
rent track and speed—are displayed at the top of the
screen.
As you head toward your destination, the middle of
the screen provides visual guidance to your waypoint
on a moving graphic “highway.” Your present position is
represented by the diamond in the center of a course
deviation indicator (CDI) scale. The line down the mid-
dle of the highway represents your desired track. As you
navigate toward a waypoint, the highway will actually
move—indicating the direction you’re off course—rela-
tive to the position diamond on the CDI scale. When
the highway is pointing straight up the screen, the way-
point is directly ahead. If the destination waypoint is to
the left, the top of the highway will lead to the left, and
vice versa. To stay on course, simply steer in the direc-
tion the highway leads (left or right) until the highway
leads straight up the page.
If you do get off the desired course by more than
1/5th of the selected CDI range, the exact distance you
are off course will be displayed where the CDI scale set-
ting normally appears. If you get too far off course (the
highway has disappeared off either side of the highway
display), a message box will appear to indicate what
course to steer to get back on course. (For information
on how to set this scale, see pg. 45.) As you approach a
waypoint, a horizontal “finish line” will move toward
the bottom of the highway.
When the finish line re a c h e s
the CDI scale, you’ve arrived at your destination.
Highway Page
REFERENCE
34
In this example, the
Highway Page indicates
that you are off course to
the left. Steer right to get
back on course. Notice the
highway always shows the
direction to turn. If the
highway leads straight up
the page, you should con-
tinue in your curre n t
direction.
If you get too far off
course, a message box will
appear to indicate the
most efficient heading to
get you back on course.
Bearing to
Waypoint
Graphic
Highway
Display
CDI Scale
Distance to
Waypoint
User Selectable
Field
Speed Over
Ground
Track
Destination
Waypoint
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 34
Map Page
The Map Page shows your position and surround-
ings, and provides you with a target cursor that lets
you pan ahead to nearby waypoints, determine the dis-
tance and bearing to a map position, and mark new
waypoints while you navigate. The Map Page is broken
down into two sections: control fields and map section.
The zoom function, panning control, and configu-
ration fields are located at the top of the screen. The
zoom function uses 18 selectable zoom ranges from 0.2
to 500 miles, or 0.3 to 800 km. (Using the zoom, pan-
ning, and configure fields will be addressed in the next
section.)
The map portion of the page displays your present
position as a diamond icon, with your track and/or
route displayed as a solid line. Nearby waypoints are
represented using symbols, with the waypoint name
also listed. You may select which of these features are
shown through the map options pages (see pgs. 37-39
for more information).
The four corners of the Map Page are used to dis-
play various navigation data: the bearing and distance
to a destination waypoint and your current track and
speed over the ground. The two fields at the top cor-
ners of the map show your bearing and distance to one
of three selectable destinations: an active destination
waypoint, a highlighted on-screen waypoint, or the
panning target crosshair. If you are not navigating to a
waypoint or using the panning function, the top data
fields will not be displayed. Your current track and
speed are shown at the bottom corners of the display.
35
Note: The map scale rep-
resents the distance from
the top to the bottom of
the Map Page. For exam-
ple, when viewing the 10
mile scale, the distance
represented between the
top of the screen and bot-
tom is 10 miles.
REFERENCE
Map Page
The four corners of the
Map Page are used to
show your track and
speed, along with distance
and bearing to either a
cursor or to a destination
waypoint.
Bearing to
Waypoint
Pan & Option
Fields
Track
Speed
Distance to
Waypoint
Zoom Scale
Present
Position
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 35
Zooming, Panning, and Map Options
There are three main functions you can perform
from the Map Page— zooming, pointing & panning,
and options (changing the map/track setup and finding
cities). Each of these functions has its own “field”,
which may be selected and activated for use. Whenever
the Map Page first appears, the zoom field (at the top
left) is always highlighted. The map has 18 map scales
which are selected through the zoom function field.
To select a zoom scale:
1. Highlight the zoom field, if not already highlighted.
2. Press the key to begin map scale selection.
3. Select a map scale and press .
The second function field on the Map Page is the
pan field, located at the top middle of the screen. The
pan function allows you to move the map with the four
arrow keys to view areas outside the current map area.
To activate the pan function:
1. Highlight the pan field.
2. Press the key to activate the pan function.
3. Use the arrow keys to move the map in any direction.
4. To cancel the pan function, press .
As you begin to move the map, a crosshair (plus
sign) will appear. This crosshair will now serve as a tar-
get marker for the moving map. The distance and bear-
ing to your destination will now be replaced by the dis-
tance and bearing from your present position to the tar-
get crosshair.
When you pan around the map, you’ll notice the
target crosshair will “snap to” on-screen waypoints and
highlight the waypoint name. Once a waypoint name is
highlighted, you can either review its waypoint defini-
tion page and waypoint display options, or execute a
GOTO function and navigate directly to the waypoint.
To review the waypoint definition page for a high-
lighted waypoint:
1. Press while the waypoint is highlighted by the
crosshair.
Zooming,
Panning, &
Map Options
REFERENCE
36
A crosshair will appear
when you activate the pan
function. The distance and
direction of the crosshair
from your current position
is shown in the upper cor-
ners of the Map Page.
On-Screen Pointing
The crosshair will “snap
to” displayed waypoints,
which allows you to quick-
ly review or go to the
selected waypoint right
from the Map Page.
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 36
Zooming, Panning, and Map Options (cont.)
From the waypoint definition page, you can also
define how each individual waypoint is displayed on
the map. The GPS 12XL displays waypoints as a name
with a corresponding symbol (e.g., “fuel” and a gas
pump symbol), a symbol only (e.g., a fish symbol), or a
16-character comment and corresponding symbol (e.g.,
“great view” and the camp site symbol). The waypoint
name has a six character limit while the “comment”
field has a 16-character limit, and there are 16 different
waypoint symbols available.
To select a waypoint display option:
1. Display the waypoint definition page for the desired
waypoint (by selecting a waypoint from the Map Page
or from a waypoint list).
2. Highlight the “symbol” field (to the right of the name
field), and press display the Symbol Options.
3. Move the cursor to the ‘DISPLAY’ field, and press
.
4. Select a display option, and press to select one
of the following display options: ‘NAME WITH SYM-
BOL,’ ‘SYMBOL ONLY,’ or ‘COMMENT WITH SYMBOL.’
5. Press to confirm the ‘DONE?’ prompt.
6. Press again (on the waypoint definition page)
to return to the Map Page.
The last function you can perform with a waypoint
highlighted on the Map Page is a GOTO directly to the
waypoint.
To go to a waypoint highlighted on the Map Page:
1. Press while the waypoint is highlight by the
crosshair.
2. Press to confirm the GOTOwaypoint page.
Using the Cursor to Mark and Go to Waypoints
During panning, the crosshair represents a target
position right on the Map Page, with the range and
bearing to the target displayed at the top corners of the
screen. You can also use the target crosshair to mark a
new waypoint position or as a GOTO destination right
from the map field.
To mark the target crosshair as a new waypoint:
1. Pan to the desired position on the map and press .
2. Enter a name and/or route number, and press .
37
You can custom tailor the
Map Page to display way-
points by any of thre e
options: Symbol Only,
Name With Symbol or
Comment With Symbol.
REFERENCE
Waypoint
Display &
Marking Cursor
Marking a Cursor
Position
To mark a new waypoint
with the crosshair, simply
pan to the desired position
and press the MARK key.
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 37
Using the Cursor to Mark and Go to (cont.)
You can also use the target crosshair as an instant
GOTO destination. This feature is similar to the MOB
mode, and will allow you to mark and instantly set a
course for a new waypoint called ‘MAP’.
To go to the target crosshair:
1. Place the target crosshair on the desired location.
2. Press , and press .
Note: To save the MAP waypoint, be sure to rename
it because it will be overwritten the next time a GOTO
is performed using the target crosshair.
Accessing Map Option Windows
You can access four additional pages—map setup,
track setup, find city and city setup—by highlighting
the ‘OPT’ field at the top right of the Map Page, and
pressing . The map options window will appear,
ready for you to select one.
To select a map option:
1. Highlight the ‘OPT’ field and press .
2. Select the desired option and press .
Map Setup Page and Orientation
The map setup page lets you select the Map Page
and satellite sky view (see pg. 12) orientation, as well as
specify what items are displayed. The Map and Satellite
Pages may be oriented to ‘NORTH UP,’ ‘TRACK UP’ (the
direction of current travel), or ‘DTK UP’ (desired track
up, or the direction of the desired course). The default
setting is ‘TRACKUP’.
To change the map orientation:
1. Highlight the ‘map’ field and press .
2. Select the desired orientation and press .
Note: Selecting the ‘DTK UP’ option will set the
satellite sky view to ‘track up’ orientation.
The rest of the map setup page lets you specify what
items are displayed or plotted on the Map Page by
selecting ‘YES’ or ‘NO’ in the appropriate field.
’Rings’— displays three range rings on the map at
increments of 1/5th the selected map scale.
’Route’— plots the straight-leg lines between way-
points of an active route and displays all
route waypoint names.
Using the
Cursor & Map
Options
REFERENCE
38
The OPT field gives
access to the map setup,
track setup, city setup and
find city pages, right from
the Map Page.
The Map Page’s default
screen orientation is ‘track
up’. ‘Track Up’ means that
the top of the map display
corresponds to your cur-
rent direction of travel.
With this setting, the map
rotates as your track
changes. It can also be set
for north up or desired
track (dtk) up orientation.
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 38
Map Setup Page and Orientation (cont.)
’Nearest’— shows up to nine nearest waypoints (from
your present position) on the map.
’Names’— displays the waypoint name for up to nine
nearest waypoints.
’Track Log’— displays and plots track log points on the
map.
To turn a map item on or off:
1. Highlight the data field next to the desired option and
press .
2. Select ‘YES’ or ‘NO’ and press .
Track Setup Page
The track setup page lets you manage the GPS 12XLs
track log data (see pg 24). You can also select whether to
record a track log and define how it is recorded.
To turn the track log on or off:
1. Highlight the ‘RECORD’ field, and press .
2. Select ‘OFF’, ‘FILL’, or ‘WRAP’, and press .
(Note: Turning the track recording off will prevent you
from using TracBack).
Track Method
The track ‘method’ option determines how often
positions are stored in the track log. The default setting
is ‘auto’, which records track points based upon a set
variance from your projected course over ground.. This
setting gives the most efficient use of track memory
and provides the best TracBack performance.
To change the method to record points based on
a specific time interval:
1. Highlight the ‘METHOD’ field, and press .
2. Select ‘TIME INTERVAL’, and press twice.
3. Enter hours, minutes, and seconds, and press .
Track Log Display
The track log option sets the number of points the
unit will attempt to display on the Map Page. The
default setting of 250 points provides good resolution
with minimal screen clutter. The maximum setting is
1024 points. Once you’ve reached the maximum num-
ber of track points, the older points will be lost as new
points are added. Note that adjusting the track points
displayed will not affect how the receiver records track
log data or the ability to create a TracBack route.
39
Use the track setup page
to control the way the GPS
12XL manages track log
data.
REFERENCE
Map & Track
Setup
Entering a large time
i n t e r val into the track
re c o rding criteria may
plot your position points
f u rther apart than they
would be in the ‘AUTO’
setting. This will increase
the distance you can trav-
el without using up your
track log, but will greatly
reduce the effectiveness of
TracBack.
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 39
Managing and Clearing the Track Log
The rest of the track setup window displays the per-
centage of available memory currently used to store
track log data, as well as a function field to clear the
track log memory.
To clear the track log:
1. Highlight ‘CLEAR LOG?’, and press .
2. Highlight ‘Yes?’, and press .
Note: It’s a good idea to clear the track log at the
beginning of the trail, etc., in order to make the best use
of the TracBack feature (see pg. 24).
Using the Find City Function
The find city page lets you search the built-in city
database for a city location, by spelling the city name.
To search for a city by name:
1. Highlight the city name field (top line) and press
.
2. Select the city name, using the arrow keys, and press
.
If the city name includes a space(s), you must select
a blank character in the appropriate place(s) while
spelling out the city name. Once selected, the latitude
and longitude for the city location will appear, along
with bearing and distance from either current position
or a reference waypoint.
To view the city location on the map:
1. Highlight ‘SHOWMAP’ and press
. The Map
Page will appear with the selected city at the center of
the page.
2. To return the map to your present position, press
.
Note: The city location may not be visible if the
map is zoomed to a large scale. Select a lower map
scale, if necessary to view the city.
You can also GOTO a city location from the map or
find city page. The GPS 12XL will create a user way-
point, using the city name, and add this point to the
user waypoint list. Keep in mind that city names will be
abbreviated to six characters when creating a user
waypoint.
To GOTO the city location from the map:
1. With the crosshair on the city location press
.
2. Press to active the GOTO
.
Track Setup
& Find City
REFERENCE
40
Clear the track log any
time your screen gets clut-
t e red or to make more
room to store points for
use with the TracBack fea-
ture.
GARMIN’s exclusive find
city function allows you to
s e a rch for a city by
spelling the city name. The
city can be displayed on
the Map Page or selected
as a GOTO destination.
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 40
To GOTO the city location from the find city page:
1. Highlight ‘GOTO’ at the bottom of the page and press
twice.
City Setup Page
The city setup page lets you select the zoom range
where city locations become visible on the map. The
cities are divided into three categories: large, medium
and small. (Large cities are those with approximate pop-
ulations greater than 100,000. Medium cities are those
with approximate populations over 5,000.)
To set the visible range for cities:
1. Highlight the desired city size field and press .
2. Select the desired map scale and press .
Main Menu Page
The GPS 12XLs Main Menu Page (shown on pgs. 18
and 27) provides access to additional pages (submenus)
that are used to customize operation and select naviga-
tion/planning features. These nine pages are divided
into categories by function. We’ve already gone over the
waypoint and route management pages in their respec-
tive sections. Let’s review the rest of these pages in the
order they appear on the Main Menu Page.
To select a submenu page from the Main Menu:
1. Highlight the submenu option, and press .
2. To return to the Main Menu Page, press .
Distance and Sun Calculations
The distance and sun calculation page will give you
the distance and bearing between any two waypoints or
between your present position and a waypoint. It will
also calculate the sunrise and sunset (in local time) for a
particular date at either your present position or any
stored waypoint.
To perform a distance and sun calculation:
1. Highlight the ‘FROM’ field, press , enter the
desired waypoint, and press again.
2. Highlight the ‘TO’ field, press , enter the destina-
tion waypoint, and press again.
3. Highlight the ‘DATE’ field. press and enter the
date you’ll arrive at your destination. Press again.
If you haven’t marked your present position as a
waypoint, just leave the ‘TO’ field blank to show the
sunrise and sunset at your present position.
41
Configure at which map
scales city locations will
appear on the Map Page,
using the city setup page.
The ‘zoom’ setting indi-
cates the maximum scale
at which the cities appear.
REFERENCE
Find City &
City Setup
The GPS12XL will calcu-
late the sunrise and sunset
times of any stored way-
point or your present posi-
tion. To calculate, enter
the date and year, then
press ENTER.
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 41
Messages
The messages page displays any current message
alerts. There are two types of messages: temporary alerts
(e.g., approaching a waypoint) and condition alerts
(e.g., battery power low). All messages are initially indi-
cated by a flashing on-screen indicator. Temporary alerts
are then cleared, while condition alerts can be viewed
again from the messages page.
Find City Function
The find city page provides the same features as the
find city selection from the map options window. See
page 40 for more information on the find city page.
Setup Menu
The setup menu displays an additional list of four
menu options used exclusively for configuring the GPS
12XL to your preferences. Menu selections for ‘system’
setup, ‘navigation’ setup, ‘interface’ setup and ‘alarms’
settings are available.
System Setup: Mode
The system setup page is used to select the operat-
ing mode, time offset, and screen preferences. The GPS
12XL has two operating modes:
Normal Mode operates the unit at maximum
performance, and provides battery life of up to 24
hours on alkaline batteries.
Simulator Mode allows you to operate the unit
without acquiring satellites, and is ideal for prac-
ticing, or entering waypoints and routes while at
home.
To select an operating mode:
1. Highlight the ‘MODE’ field, and press .
2. Select a mode and press .
System Setup: Offset
The date and time offset is located directly below
the mode field. Note: Date and time information is
derived from the GPS satellites and cannot be changed
by the user. Because the time shown is UTC (Greenwich
Mean Time) time, you will need to enter a time offset to
display the correct local time for your area. To deter-
mine the time offset for your area, note your position
and refer to the chart in Appendix C.
Messages &
Setup Menu
REFERENCE
42
Select the ‘Setup Menu
option from the Main
Menu to access configura-
tion options for your GPS
12 XL.
The GPS 12XLs two oper-
ating modes are accessed
through the system setup
submenu.
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 42
To enter the time offset:
1. Highlight the ‘OFFSET’ field, and press .
2. Enter the time offset, and press . Note: Move
the cursor to the left to change the plus or minus sign.
System Setup: Hours (Time Format)
The time display shown on the system setup and
Position Pages may be set to display the time in a 12-
or 24-hour format.
To select the time format:
1. Highlight the ‘HOURS’ field, and press .
2. Select 12- or 24-hour display, and press .
System Setup: Screen Contrast
The GPS 12XL has adjustable screen contrast con-
trolled by an on-screen bar scale.
To set the screen contrast:
1. Highlight the ‘CONTRAST’ field, and press .
2. Adjust the bar scale to the desired contrast, and
press .
Note: The screen contrast can also be adjusted by
pressing the rocker keypad while on the Satellite Page
(see pg. 11).
System Setup: Backlighting Timeout
The screen backlight timeout is adjustable for 15,
30, 60, 120, or 240 seconds. The timeout may be can-
celled by setting it to ‘Stay On’ continuously. Whenever
backlighting is on, a bulb icon will appear on the
Satellite Page.
To set the backlight timeout:
1. Highlight the ‘LIGHT’ field, and press .
2. Select the desired setting, and press .
3. To turn lighting on and off, press briefly.
System Setup: Tone Setting
The GPS 12XL allows you to choose a tone for mes-
sages only, messages and keystrokes, or no tone at all.
To set the tone:
1. Highlight the ‘TONE’ field and press the key.
2. Select the desired setting and press .
43
To display the corre c t
local time, you must enter
the appropriate offset. See
the chart at the end of
Appendix C.
REFERENCE
System Setup
The “Stay On” setting will
keep your backlighting on
continuously. However, if
you use backlighting fre-
quently, this setting will
significantly reduce your
battery life.
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 43
Navigation Setup Page
The navigation setup page is used to select the
desired position format, map datum, CDI scale, units of
measure for speed and distance, and a heading reference.
Navigation Setup: Position Formats
The default position format for the GPS 12XL is lati-
tude and longitude in degrees and minutes (hdddº
mm.mmm’). You may also select degrees, minutes and
seconds (hdddºmm’ss.s’’); degrees only (hddd.dddddº);
UTM/UPS; MGRS; Maidenhead; User-defined Grid; or
regional British, German, Irish, Indonesian, Indian,
Swedish, Swiss, Taiwan, or West Malayan grids.
To select a position format:
1. Highlight the ‘POSITION FRMT’ field, and press .
2. Select the desired setting, and press .
Navigation Setup: User Grid Position Format
The ‘User Grid’ option lets you create a user-defined
position format by establishing factors such as longitude
of origin, scale, and false Easting or Northing.
To define a user grid:
1. Select ‘User Grid’, and press .
2. Enter values for longitude origin, scale, and false
Easting and Northing, and press .
3. Highlight ‘SAVE?’, and press .
Navigation Setup: Map Datums
The ‘MAP DATUM’ field comes with a ‘WGS 84’
default setting. Although over 100 map datums are
available for use (see Appendix D for map datums), you
should only change the datum if you are using maps or
charts that specify a different datum than WGS 84. If no
datum is specified, you may select each datum applica-
ble to your region until you find the datum that pro-
vides the best positioning at a known point.
To select a map datum:
1. Highlight the ‘MAP DATUM’ field, and press .
2. Select the desired setting, and press .
Warning: Selecting the wrong map datum can result
in substantial position errors. When in doubt, use the
default WGS 84 datum for best overall performance.
Navigation
Setup
REFERENCE
44
The position format may
be set to display your
choice of many formats.
Note: degree and minutes
is the default setting.
The default map datum
covers world-wide naviga-
tion. However, if you are
using a paper map or
chart which uses a differ-
ent map datum that WGS
84, then you may wish to
switch to that datum to
make your GPS 12XL
position readout corre-
spond to the chart.
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 44
Navigation Setup: Map Datums (continued)
To define a user datum:
1. Highlight the ‘MAP DATUM’ field, and press .
2. Scroll through the map datum options until ‘User’
appears, and press .
3. Enter the five parameters of the map datum—‘DX’,
‘DY’, ‘DZ’, ‘DA’, and ‘DF’—using the rocker keypad,
and press .
The signs of each value should fol-
low the convention: WGS 84 +/- local geodetic system.
4. Highlight ‘SAVE?’, and press .
Navigation Setup: CDI Scale
The course deviation indicator (CDI) field lets you
select the range of the CDI bar scale on the Highway
Page. Four scales are available: +/- 0.02, 0.25 (default),
1.25, and 5.0 miles or kilometers. Note: This CDI
value represents the full scale limits (left or right from
center) of the CDI.
To enter a CDI scale setting:
1. Highlight the ‘CDI’ field, and press .
2. Select the desired setting, and press .
Navigation Setup: Units of Measure
The GPS 12XL lets you select statute (default), nau-
tical, or metric units of measure for all speed and dis-
tance readouts.
To change the unit of measure:
1. Highlight the ‘UNITS’ field, and press .
2. Select the desired units of measure, and press .
Navigation Setup: Heading Reference
The GPS 12XLs heading information can be dis-
played referencing magnetic north (automatic or user-
defined), true north, or calculated grid headings. The
default setting is automatically-calculated magnetic
north, which is suitable for most applications.
To select a heading reference:
1. Highlight the ‘HEADING’ field, and press .
2. Select the desired heading reference, and press
.
To enter a user-defined magnetic heading:
. 1. Select ‘User Mag’ and press .
2. Enter the degrees and direction of magnetic variation,
and press .
45
The user datum feature
allows you to define the
earth model used to calcu-
late position coordinates.
WA R N I N G: Incorre c t
entries may result in sub-
stantial position errors.
REFERENCE
Navigation
Setup
To enter a user- d e f i n e d
magnetic variation, select
the ‘User Mag’ option and
enter the desired direction
and degrees.
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 45
Alarms
The alarms page is used to set two alarms on the
GPS 12XL: arrival and CDI. The arrival alarm will alert
you when you are approaching a waypoint. The arrival
alarm has three available settings:
• ’Off’— No alarm will occur.
’On’— The alarm will occur at the user-specified dis-
tance from the destination waypoint.
’Auto’— The alarm will occur at one minute away
(based upon current speed, distance & track)
from the each waypoint in the active route or
from the GOTO destination.
Note: When using a route, the arrival alarm will
only occur for the final destination waypoint—not any
interim waypoints along the route.
To set the arrival alarm:
1. Highlight the ‘ARRIVAL’ field and press .
2. Select ‘On’, ‘Auto’ or ‘Off’, and press .
3. If ‘On’ is selected, highlight the distance field, press
, enter the desired distance and press .
The CDI alarm will alert you if your position devi-
ates off course (left or right) beyond the limits specified.
To set the CDI alarm:
1. Highlight the ‘CDI Alarm’ field and press .
2. Select ‘On’ or ‘Off’, and press .
3. If ‘On’ is selected, highlight the distance field, press
, enter the desired distance and press .
Note: The arrival and CDI alarms both have setting
ranges from 0.0 to 9.9 units (statute miles/nautical
miles/kilometers). Setting the CDI alarm to its lowest
limits may cause false alarms due to the effects of
DOD-imposed Selective Availability. Selective
Availability can degrade your GPS position by as much
as 100 meters.
Alarms
REFERENCE
46
The arrival alarm alerts
you when you’ve reached
your destination. Auto’
provides an alert at one
minute from your destina-
tion. ‘On’ allows you to
define an alarm distance.
The CDI alarm warns you
when you deviate off
course (left or right)
beyond the limits that you
set.
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 46
Interface Setup
The GPS 12XLs interface page lets you specify the
formats for connecting external devices. There are six
options: GRMN/GRMN, None/None, RTCM/None,
RTCM/NMEA
, NMEA/NMEA, and None/NMEA. Each
option lists the input format first, followed by the out-
put format.
To select an I/O format:
1. Highlight the I/O field and press .
2. Select the desired setting and press .
The GRMN/GRMN setting is a proprietary format
that lets you exchange information such as waypoints,
routes, and track logs between two GARMIN GPS units
or the GPS 12XL and a PC. The transfer mode field is
directly below ‘GRMN/GRMN’, and allows you to spec-
ify what information to request or send to a second
GPS unit. The ‘Host’ setting lets you control all data
transfer functions from the second GPS unit or a PC.
To select a transfer mode:
1. Highlight the transfer mode field and press .
2. Select a desired setting, and press .
To disable all interfacing capabilities, select the
‘None/None’ setting. If you want to output NMEA data
without any differential input capability, select
‘None/NMEA’.
Interface Setup: DGPS
The last two format settings allow the differential-
ready GPS 12XL to accept RTCM DGPS corrections in
RTCM 104 version 2.0 format. Using DGPS corrections
will improve receiver accuracy to 1-5 meters, regardless
of errors induced by the U.S. Dept. of Defense Selective
Availability (SA) program. Two RTCM options are avail-
able: ‘RTCM/NONE’, which allows connection to a bea-
con receiver with no output capability; and ‘RTCM/
NMEA’, which allows DGPS input and NMEA output.
When ‘RTCM/NMEA’ is selected, the GPS 12XL will
either automatically try to tune the last frequency and
bit rate you selected or will switch to the default fre-
quency of 304.0 kHz with a bit rate of 100 bps if no
previous beacon has been tuned. (You may also enter
your own frequency and bit rate if desired.) This infor-
mation is used to tune/control an optional GARMIN
GBR 21 differential beacon receiver. Note: Use the
‘RTCM/NONE’ setting if your beacon receiver does not
support these software-driven controls.
47
The ‘GRMN/GRMN’ op-
tion allows the GPS 12XL
to exchange data with a
PC or another GPS unit.
Use this setting with the
optional PC Software Kit.
REFERENCE
Interface Setup
& DGPS
Select the ‘RTCM/NMEA
option to use the GPS
12XL along with a GBR
21 Diff e rential Beacon
Receiver.
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 47
Interface Setup: DGPS (continued)
To enter a DGPS beacon frequency:
1. Highlight the ‘FREQ’ field, and press .
2. Enter the desired frequency, and press .
3. Highlight the ‘RATE’ field, and press .
4. Select the desired bit rate (bps), and press .
Note: The frequency and bit rate fields are disabled
when the ‘RTCM/NONE’ option is selected.
When the GPS 12XL is receiving DGPS corrections
from the GBR 21, the ‘BEACON RECVR’ section of the
I/O setup page will display the beacon frequency and
signal strength, as well as the distance from the beacon
transmitter to your present position. At the bottom of
the beacon receiver field, a status message will keep you
informed of DGPS activity:
• A ‘Tuning’ message will be displayed while a bea-
con receiver is selecting a frequency/bit rate and
waiting for signal reception.
Once a valid beacon signal has been received, a
‘Receiving’ message will be displayed.
If the beacon signal is received and no correction
data is being received, a ‘No Data’ message will be
displayed.
If a beacon frequency cannot be tuned and/or no
signal is received, a ‘No Status’ message will be
displayed.
The message page will alert you to any problems
relating to DGPS operation. You may also monitor the
DGPS status from the status field on the interface page.
The GPS12XL will display one of three alert messages
concerning DGPS operation:
No DGPS Position— there is not enough correc-
tion data available to compute a DGPS position.
No RTCM Input— the beacon receiver is not
properly connected, the baud rates do not match or
no signal is being provided.
RTCM Input Failed— DGPS data was being
received but has been lost.
DGPS
REFERENCE
48
The baud rate is selec-
table for all RTCM and
NMEA interface options.
Alert messages will signal
any problems with DGPS
operation.
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 48
Navigation Simulator
The GPS 12XLs simulator mode lets you practice all
aspects of its operation without active satellite acquisi-
tion. You can plan and practice trips, enter new way-
points and routes, and save them for use during nor-
mal operation.
To activate the simulator:
1. From the Main Menu Page, highlight ‘SYSTEM
SETUP’, and press .
2. Highlight the ‘MODE’ field, and press .
3. Select ‘Simulator?’, and press .
Once the simulator mode has been activated, use
the Position, Compass, or Highway Page to set your
speed and track by highlighting the appropriate field,
entering the desired value, and pressing . You
may also enter a new position if you desire (from the
Position Page).
The GPS 12XLdoes not track satellites in simu -
lator mode. Although you can create and save
waypoints and routes while using the simulator
mode, never attempt to use the simulator mode
for actual navigation.
49
Select the simulator mode
from the operation mode
choices and press ENTER.
You may return to normal
operation by changing the
operation mode or by
turning the unit off and
back on.
REFERENCE
Navigation
Simulator
!
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 49
Initializing Your GPS 12XL for First-Time Use
The GPS 12XL typically acquires a position fast
enough that initialization is not required. However, ini-
tialization may be necessary for the following:
• After memory loss
When the receiver has been moved more than
500 miles with the power off.
Additionally, it may be necessary to initialize the
unit the first time you use it, if it does not acquire a fix
after the first few minutes.
The receiver is shipped from the factory in
AutoLocate™ mode, which enables the GPS 12XL to
determine its location anywhere in the world. To speed
up the initialization process, we recommend using the
graphic initialization described below, which will usual-
ly provide a fix in a few minutes.
To turn the GPS 12XL on:
1. Press and hold until the receiver turns on.
The welcome page will be displayed while the unit
conducts a self test.
Once testing is complete, the welcome page will be
replaced by the Satellite Page, and the EZinit prompt
may appear prompting you to select one of two initial-
ization methods:
Select Country––allows you to initialize the
receiver by selecting your present position from a
list of countries in the GPS 12XLs internal data-
base. This typically provides a position fix in under
three minutes.
Autolocate
TM
––allows the GPS 12XL to initialize
itself and calculate a position fix without knowing
your present position. This usually provides a posi-
tion fix in 3-5 minutes.
If the EZinit prompt has not automatically
appeared on the Satellite Page:
1. Press the key.
Note: If the EZinit prompt ever appears after you
have initialized the receiver (due to the antenna’s view
of satellites being obstructed by trees, etc.), highlight
the ‘NO RE-INIT’ selection with the arrow keypad and
press .
Initialization
APPENDIX A
50
Welcome Page
The EZinit prompt will
automatically appear if
the receiver needs to be
initialized. The pro m p t
may also appear during
normal use if the antenna
is shaded, thereby block-
ing satellite reception.
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 50
To initialize the receiver:
1. If the ‘COUNTRY’ option is not highlighted, press the
key repeatedly to move the field highlight to the
‘COUNTRY’ option.
2. Press the key.
3. Use the key to scroll through the list options until
the country of your present position appears.
4. Use the key to highlight the country/state/region
you’re in. If the country you’re in is not listed, select
any other country within 500 miles of your present
position.
5. Press to finish.
The GPS 12XL will now begin searching for the
appropriate satellites for your location and should
acquire a position in under three minutes. You can ver-
ify that you have acquired a position by watching the
Satellite Page transition to the Position Page (provided
you haven’t pressed any other buttons) or by looking
for a ‘2D NAV’ or ‘3D NAV’ status at the top-left corner
of the Satellite Page.
Initialization Troubleshooting
If you have trouble initializing the receiver or
acquiring a position, check the following:
Does the unit have a clear view of the sky?
If there are large buildings or mountains nearby, or
if there is heavy tree cover, the receiver may not be
receiving enough satellite signals to calculate a
position.
Have you selected the right country/state/region
from the EZinit list?
Check for the correct approximate lat/lon on the
Position Page, or reselect the appropriate country
from the list to restart the initialization.
Have you moved more than 500 miles from the
last calculated position with the receiver off?
Reinitialize the receiver, selecting the country/state/
region of your new location from the EZinit list.
Your unit should now be initialized.
51
Use the arrow keypad to
highlight the country,
region, or state of your
present position from the
list and press ENTER. If
the country is not listed,
select the closest country
instead.
APPENDIX A
Initialization
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 51
Specifications
& Wiring
APPENDIX B
52
Never attempt any repairs yourself. To protect your GPS 12XL,
keep it in its carrying case when not in use, and never allow gaso-
line or other solvents to come into contact with the case. Clean the
case and lens with a soft cloth and a household window cleaner.
PHYSICAL
Case: waterproof*
Size: 14.6 x 5.1 x 3.4 cm
Weight: Approx 9.5 ounces (269g) w/ batteries
Temperature Range: 5º to 158ºF (-15º to 70ºC)
PERFORMANCE
Receiver: 12 parallel channel, differential-ready
Acquisition Time: Approx. 15 seconds (warm start)
Approx. 45 seconds (cold start)
Approx. 5 minutes (AutoLocate
TM
)
Update Rate: 1/second, continuous
Position Accuracy: 1-5 meters (3-17 ft.) with DGPS corrections**
15 meters (49 ft.) RMS***
Velocity Accuracy: 0.1 knot RMS steady state
Dynamics: 6g
POWER
Input: Four 1.5 volt AA batteries or 10-32 vDC
Power Consumption: 1 watt
Battery Life: Up to 24 hours (with 4 AA batteries)
Internal Backup: lithium battery
NOTE: Alkaline batteries lose a significant amount of their capacity as temperature decreas-
es. If you’re using the GPS 12XL in below freezing temperatures, use lithium batter-
ies for longer battery life. Extensive use of screen backlighting will significantly
reduce battery life.
Specifications subject to change without notice.
* Meets IEC (European Community Specification) 529 IPX7 for protection against immersion for
30 minutes at a depth of 1 meter.
** With optional DGPS input.
*** Subject to accuracy degradation to 100m 2DRMS under the US DOD-imposed Selective
Availability Program.
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 52
APPENDIX B
Specifications &
Wiring
Three optional cables are available to connect the GPS 12XL to an external
power source or interface with another unit or PC:
Cigarette Lighter Adapter— Allows connection to a 12-volt DC cigarette
lighter plug. Part No. 010-10085-00.
Data Transfer Cable— Allows data transfer between GARMIN GPS units. The
GPS 12XL is compatible with the following units: GPS 38/40/45/45XL, GPS
II/II plus, GPS12, and GPS 12XL. Information that can be transferred
includes the almanac, waypoints, routes, and tracklog. However, waypoint
symbols are only transferrable from or to units that support waypoint symbols
such as the GPS II plus, GPS 12, and GPS 12XL software version 3.01 or
later. Part No. 010-10142-00.
PC Kit Interface Cable— PC interface cable with 9-pin ‘D’ serial data connec-
tor. Part No. 010-10141-00. (A combined Cigarette Lighter Adapter and PC
Interface Cable is also available as Part No. 010-10165-00.)
The following interface formats are supported by the GPS 12XL for connection
to up to three NMEA devices:
unit view
NMEA 0180
NMEA 0182
NMEA 0183 version 1.5
Approved sentences:
GPRMB, GPRMC, GPWPL
Proprietary sentences:
PGRMM (map datum),
PGRMZ (altitude), PSLIB
(beacon rec. control)
NMEA 0183 version 2.0
Approved sentences:
GPGGA, GPGSA, GPGSV,
GPRMB, GPRMC, GPRTE,
GPWPL
Proprietary sentences:
PGRME (estimated error),
PGRMM (map datum), PSLIB
(beacon receiver control)
DGPS corrections are accepted on
RTCM-104 v. 2.1 format.
53
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 53
Messages &
Time Offsets
APPENDIX C
The GPS 12XL uses a flashing on-screen message indi-
cator to alert you to important information. Whenever the
message indicator appears, press PAGE to view the mes-
sage page. There are two types of messages: temporary
alerts and condition alerts. Temporary alerts are cleared
from the message page after viewing, while condition
alerts remain until the condition has been resolved. Pay
careful attention to all messages for your own safety.
Active WPT Can’t be Deletd—You have attempted to change the “active to” or “active from”
waypoint. Clear the active route or GOTO before making your changes.
Accuracy has been Degraded—The accuracy of the GPS 12XL has been degraded beyond 500
meters due to poor satellite geometry or data quality. You should check other navigational
sources to verify the position indicated.
Already Exists—The name you are entering already exists in the GPS 12XLs memory.
Arrival at (or Approaching)____—You are one minute away from reaching a destination way-
point or at the distance specified on the alarms submenu.
Battery Power is Low—Thebatteries are low and should be replaced.
CDI Alarm—You are left or right of course, beyond the limits set on the alarms submenu.
No DGPSPosition—Not enough data is available to compute a DGPS position.
No RTCM Input—
Beacon receiver is improperly connected or baud rates do not match.
Poor GPS Coverage—The GPS 12XL cannot acquire the necessary number of satellites to com-
pute a position. Try another location with a clearer view of the sky.
Power Down and Re-init—The GPS 12XL is not able to calculate a position due to abnormal
satellite conditions. Turn the unit off and verify the last position shown by other means. Try the
unit again later, possibly in a different location.
PROX Alarm—You have entered the alarm circle for a specific proximity waypoint.
Proximity Overlapped—The alarm circles of two proximity waypoints overlap which could
cause difficulty in monitoring distances to each waypoint.
Proximity Wpt can’t be Deleted—The waypoint you are trying to delete is listed as a proximi-
ty waypoint and must be removed from the list before it can be deleted.
Read Only Mem has Failed—The permanent memory has failed and the unit is not operable.
Received an Invalid WPT—A waypoint was received during upload transfer that has an
invalid identifier.
Receiver has Failed—A failure in receiver hardware has been detected. If this message persists,
do not use the unit and take it to an authorized dealer for repair.
Route is Full—You have attempted to add more than 30 waypoints to a route.
Route is not Empty—You have attempted to copy into a route already in use.
Route Waypoint Can’t be Deleted—The waypoint you are trying to delete is part of a route.
Delete the waypoint from the route before removing it from memory.
54
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 54
APPENDIX C
Messages &
Time Offsets
Route Waypoint was Deleted—A route waypoint entered does not exist in the database and
has been deleted from the route.
RTCMInput has Failed—DGPS data being received has been lost. You are no longer receiv-
ing the beacon signal.
Searching the Sky—The GPS 12XL is in searching the sky for almanac data or the unit is in
AutoLocate
TM
mode.
Stored Data was Lost—All waypoints, routes, time and almanac data has been lost due to
battery failure or clearing the receiver’s memory.
Track Memory is Full—All track log points in memory have been used. You must either
delete the current tracklog or switch the record option to ‘WRAP’ which will begin erasing the
oldest tracklog points as new ones are added.
Transfer has been Completed—The receiver is finished uploading or downloading informa-
tion to the connected device.
WPT Memory is Full—You have used all 500 waypoints in the GPS 12XL. Delete unwanted
waypoints to make room for new entries.
Time Offset Chart
The table below gives approximate UTC time offset for various longitudinal
zones. If you are in daylight savings time, add one hour to the offset.
Longitudinal Zone Offset Longitudinal Zone Offset
W180.0º to W172.5º -12 E007.5º to E022.5º 1
W172.5º to W157.5º -11 E022.5º to E037.5º 2
W157.5º to W142.5º -10 E037.5º to E052.5º 3
W142.5º to W127.5º -9 E052.5º to E067.5º 4
W127.5º to W112.5º -8 E067.5º to E082.5º 5
W112.5º to W097.5º -7 E082.5º to E097.5º 6
W097.5º to W082.5º -6 E097.5º to E112.5º 7
W082.5º to W067.5º -5 E112.5º to E127.5º 8
W067.5º to W052.5º -4 E127.5º to E142.5º 9
W052.5º to W037.5º -3 E142.5º to E157.5º 10
W037.5º to W022.5º -2 E157.5º to E172.5º 11
W022.5º to W007.5º -1 E172.5º to E180.0º 12
W007.5º to E007.5º 0
55
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 55
Map Datums
APPENDIX D
56
The following list shows the map datums available for
the GPS 12XL. Menu abbreviations are listed first, fol-
lowed by the corresponding map datum name and area.
The default map datum for the GPS 12XL is WGS 84.
Adindan Adindan- Ethiopia, Mali,
Senegal, Sudan
Afgooye Afgooye- Somalia
AINELABD ‘70 AIN ELANBD 1970- Bahrain
Island, Saudi Arabia
Anna 1 Ast ‘65 Anna 1 Astro ‘65- Cocos Isl.
ARC 1950 ARC 1950- Botswana,
Lesotho, Malawi, Swaziland,
Zaire, Zambia, Zimbabwe
ARC 1960 ARC 1960- Kenya, Tanzania
Ascnsn Isld ‘58 Ascension Island ‘58-
Ascension Island
Astro B4 Sorol Astro B4 Sorol Atoll- Tern
Island
Astro Bcn “E” Astro Beacon “E”- Iwo Jima
Astro Dos 71/4 Astro Dos 71/4- St. Helena
Astr Stn ‘52 Astronomic Stn ‘52- Marcus
Island
Astrln Geod ‘66 Australian Geod ‘66-
Australia, Tasmania Island
Astrln Geod ‘84 Australian Geod ‘84-
Australia, Tasmania Island
Austria Austria
Bellevue (IGN) Efate and Erromango Islands
Bermuda 1957 Bermuda 1957- Bermuda
Islands
Bogata Observ Bogata Obsrvatry- Colombia
Campo Inchspe Campo Inchauspe- Argentina
Canton Ast ‘66 Canton Astro 1966- Phoenix
Islands
Cape Cape- South Africa
Cape Canavrl Cape Canaveral- Florida,
Bahama Islands
Carthage Carthage- Tunisia
CH-1903 CH 1903- Switzerland
Chatham 1971 Chatham 1971- Chatham
Island (New Zealand)
Chua Astro Chua Astro- Paraguay
Corrego Alegr Corrego Alegre- Brazil
Djakarta Djakarta (Batavia)- Sumatra
Island (Indonesia)
Dos 1968 Dos 1968- Gizo Island
(New Georgia Islands)
Easter Isld 67 Easter Island 1967
European 1950 European 1950- Austria,
Belgium, Denmark, Finland,
France, Germany, Gibraltar,
Greece, Italy, Luxembourg,
Netherlands, Norway,
Portugal, Spain, Sweden,
Switzerland
European 1979 European 1979- Austria,
Finland, Netherlands,
Norway, Spain, Sweden,
Switzerland
Finland Hayfrd Finland Hayford- Finland
Gandajika Base Gandajika Base- Republic of
Maldives
Geod Datm ‘49 Geodetic Datum ‘49-
New Zealand
Guam 1963 Guam 1963- Guam Island
Gux 1 Astro Gux 1 Astro- Guadalcanal
Island
Hjorsey 1955 Hjorsey 1955- Iceland
Hong Kong ‘63 Hong Kong ‘63- Hong Kong
Hu-Tzu-Shan Taiwan
Indian Bngldsh Indian- Bangladesh, India,
Nepal
Indian Thailand Indian- Thailand, Vietnam
Indonesia ‘74 Indonesia 1974- Indonesia
Ireland 1965 Ireland 1965- Ireland
ISTS 073 Astro ISTS 073 ASTRO ‘69-
Diego Garcia
Johnston Island Johnston Island Kandawala
Kandawala- Sri Lanka
Kerguelen Islnd Kerguelen Island, Kandawala,
Sri Lanka
Kertau 1948 Kertau 1948- West Malaysia,
Singapore
L. C. 5 Astro Cayman Brac Island
Liberia 1964 Liberia 1964- Liberia
Luzon Mindanao Luzon- Mindanao Island
Luzon Philippine Luzon- Philippines
(excluding Mindanao Island)
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 56
Mahe 1971 Mahe 1971- Mahe Island
Marco Astro Marco Astro- Salvage Island
Massawa Massawa- Eritrea (Ethiopia)
Merchich Merchich- Morocco
Midway Ast ‘61 Midway Astro ‘61- Midway
Minna Minna- Nigeria
NAD27 Alaska North American 1927- Alaska
NAD27 Bahamas North American 1927-
Bahamas (excluding San
Salvador Island)
NAD27 Canada North American 1927-
Canada and Newfoundland
NAD27 Canal Zone North Am. 1927- Canal Zone
NAD27 Caribbn North American 1927-
Caribbean (Barbados, Caicos
Islands, Cuba, Dom. Rep.,
Grand Cayman, Jamaica,
Leeward and Turks Islands)
NAD27 Central North American 1927-
Central America (Belize, Costa
Rica, El Salvador, Guatemala,
Honduras, Nicaragua)
NAD27 CONUS North Am. 1927- Mean Value
NAD27 Cuba North American 1927- Cuba
NAD27 Grnland North American 1927-
Greenland (Hayes Peninsula)
NAD27 Mexico N. American 1927- Mexico
NAD27 San Sal North American 1927- San
Salvador Island
NAD83 North American 1983- Alaska,
Canada, Central America,
CONUS, Mexico
Nhrwn Masirah Nahrwn- Masirah Island
(Oman)
Nhrwn Saudi A Nahrwn- Saudi Arabia
Nhrwn United A Nahrwn- United Arab
Emirates
Naparima BWI Naparima BWI- Trinidad and
Tobago
Obsrvtorio ‘66 Observatorio 1966- Corvo
and Flores Islands (Azores)
Old Egyptian Old Egyptian- Egypt
Old Hawaiian Old Hawaiian- Mean Value
Oman Oman- Oman
Ord Srvy GB Old Survey Grt Britn-
England, Isle of Man,
Scotland, Shetland Isl., Wales
Pico De Las Nv Canary Islands
Potsdam Potsdam-Germany
Ptcairn Ast ‘67 Pitcairn Astro ‘67- Pitcairn Is
Prov S Am ‘56 Prov So Amricn ‘56- Bolivia,
Chile,Colombia, Ecuador,
Guyana, Peru, Venezuela
Prov S Chln ‘63 Prov So Chilean ‘63- S. Chile
Puerto Rico Puerto Rico & Virgin Islands
Qatar National Qatar National- Qatar
Qornoq Qornoq- South Greenland
Reunion Reunion- Mascarene Island
Rome 1940 Rome 1940- Sardinia Island
RT 90 Sweden
Santo (Dos) Santo (Dos)- Espirito Santo
Island
Sao Braz Sao Braz- Sao Miguel, Santa
Maria Islands (Azores)
Sapper Hill ‘43 Sapper Hill 1943- East
Falkland Island
Schwarzeck Schwarzeck- Namibia
Sth Amrcn ‘69 South American ‘69-
Argentina, Bolivia, Brazil,
Chile, Colombia, Ecuador,
Guyana, Paraguay, Peru,
Venezuela, Trinidad and
Tobago
South Asia South Asia- Singapore
SE Base Southeast Base- Porto Santo
and Madiera Islands
SW Base Southwest Base- Faial,
Graciosa, Pico, Sao Jorge and
Terceira Islands (Azores)
Timbalai 1948 Timbalai 1948- Brunei and E.
Malaysia (Sarawak and Sabah)
Tokyo Tokyo- Japan, Korea, Okinawa
Tristan Ast ‘68 Tristan Astro 1968- Tristan da
Cunha
Viti Levu 1916 Viti Levu 1916- Viti Levu/ Fiji
Islands
Wake-Eniwetok Wake-Eniwetok- Marshall Isl.
WGS 72 World Geodetic System 1972
WGS 84 World Geodetic System 1984
Zanderij Zanderij- Surinam
APPENDIX D
Map Datums
57
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 57
A
Activating a Route . . . . . .28
Active Route Page . . . . . .29
Acquiring a position . . . . . .8
Alarms . . . . . . . . . . . . . . .46
Altitude (ALT) . . . . . . . . .15
Arrival Alarm . . . . . . . . . .46
AutoLocate™ . . . . . . . . . .50
Average Speed (AVSPD) . .15
Averaging positions . . . . .17
B
Battery Installation . . . . . . .4
Battery Level . . . . . . . . . .14
Battery Life . . . . . . . . .4, 52
C
Cancelling a GOTO . .10, 23
Cautions . . . . . . . . . . . . . .ii
CDI . . . . . . . . . . .34, 45-46
CDI Alarm . . . . . . . . . . . .46
Cigarette Lighter Adapter .53
City database . . . . . . .23, 40
City Setup . . . . . . . . . . . .41
Clearing Routes . . . . . . . .29
Clearing Track Log .11,24,40
Compass Page .7, 10, 31, 33
Configuring the Map . . . .38
Copying Routes . . . . . . . .29
Course to Steer (CTS) . . .32
Creating Routes . . . . . . . .28
Crosstrack Error (XTK) . .32
D
Date and Time . . . . . . . . .43
Deleting Waypoints . . . . .22
DGPS Interface . . . . . .47-48
Distance/Sun Calculations 41
E
Editing Routes . . . . . . . . .30
Elapsed Time (ELPSD) . . .15
Emergency Erase . . . . . . .14
Est. Time Enroute (ETE) .32
Est. Time of Arrival (ETA) 32
EZinit . . . . . . . . . . . .13, 50
F
Finding cities . . . .23, 40, 42
G
GOTO . . . . . . . . . . . .23, 30
Going To a City . . . . . . . .40
Going To a Waypoint . .9, 23
Graphic heading display . .15
H
Highway Page . . . . . .31, 34
I
I/O format . . . . . . . . . . . .47
Initializing . . . . . . . . . . . .50
Interface Setup . . . . . . . . .47
Inverting a Route . . . . . . .28
Index
APPENDIX E
58
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 58
M
Mag. Heading Reference . .45
Man Overboard . . . . . . . .23
Map Cursor . . . . . . . . . . .37
Map Datums . . . . . . .44, 56
Map Options . . . . . . .37-38
Map Orientation . . . . . . .38
Map Page . . . . . . . . .7, 9, 35
Map Setup . . . . . . . . . . . .38
Marking a Position . . . .8, 17
Max. Speed (MXSPD) .15-16
Maximum Speed (MXSPD)15
Main Menu Page . . . . .7, 41
Messages . . . . . . . . . .42, 54
N
NMEA Formats . . . . . . . . 53
Navigation Pages . . . . .7, 31
Navigation Setup . . . .44-45
Nearest Waypoints . . . . . .18
O
On-Route GOTOs . . . . . .30
Operating modes . . . . . . .42
P
Page Sequence . . . . . . . . . .6
Panning . . . . . . . . . . . . . .36
Position Averaging . . . . . .17
Position Formats . . . . . . .44
Position Page . . . . . . . .6, 15
Primary Pages . . . . . . . . . .6
Proximity Waypoints . . . .19
R
Receiver Status . . . . . . . . .13
Reference Waypoints . . . .20
Renaming Waypoints . . . .22
Routes
Clearing . . . . . . . . . . . .29
Copying . . . . . . . . . . . .29
Creating . . . . . . . . . . . .28
Editing . . . . . . . . . . . . .30
Inverting . . . . . . . . . . .28
Navigating Routes . . . . .28
On-Route GOTO’s . . . .30
Route Definition Page . .27
Route Navigation . . . . .26
S
Satellite Page . . . . . . . .6, 12
Scanning Waypoints . . . . .22
Screen Backlighting 11,14,43
Screen Contrast . . . . .11, 43
Signal Strength Bars . . . . .12
Simulator . . . . . . . . . . . . .49
Sky View . . . . . . . . . . . . .12
Specifications . . . . . . . . . .52
Symbols . . . . . . . . . . .21, 37
System Setup . . . . . . .42-43
59
APPENDIX E
Index
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 59
T
Time Format . . . . . . . . . .43
Time Offset . . . . . . . . . . .42
TracBack Navigation . . . . .24
TracBack Tips . . . . . . . . .25
Track Log Display . . .24, 39
Track Method . . . . . . . . .39
Track Setup . . . . . . . . . . .39
Trip odometer . . . . . . . . .15
Trip Timer (TTIME) . . . . .15
Troubleshooting . . . . . . . .49
Turn (TRN) . . . . . . . . . . .32
U
Units of Measure . . . . . . .45
User Grid . . . . . . . . . . . .44
User Heading . . . . . . . . . .45
Using the Keypad . . . . . . .5
V
Velocity Made Good (VMG)
32
W
Warranty . . . . . . . . . . . . .61
Waypoints
Comments . . . . . . . . . .21
Definition Page . . . . . . .20
Deleting . . . . . . . . . . . .22
Going to a Waypoint .9, 23
Nearest Waypoints . . . .18
Proximity Waypoints . . .19
Reference Waypoints . . .20
Renaming . . . . . . . . . . .22
Scanning . . . . . . . . . . .22
Waypoint List . . . . . . . 18
Waypoint Pages . . . . . .18
Waypoint Symbols .21, 37
Z
Zooming . . . . . . . . . . . . .36
Index
APPENDIX E
60
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 60
GARMIN Corporation warrants this product to be free from
defects in materials and workmanship for one year from the date of
purchase. GARMIN will at its sole option, repair or replace any com-
ponents which fail in normal use. Such repairs or replacement will
be made at no charge to the customer for parts or labor. The cus-
tomer is, however, responsible for any transportation costs. This war-
ranty does not cover failures due to abuse, misuse, accident or unau-
thorized alteration or repairs. GARMIN assumes no responsibility for
special, incidental, punitive or consequential damages, or loss of use.
The warranties and remedies contained herein are exclusive and
in lieu of all other warranties expressed or implied, including any lia-
bility arising under warranty of merchantability or fitness for a par-
ticular purpose, statutory or otherwise. This warranty gives you spe-
cific legal rights, which may vary from state to state.
To obtain warranty service, call the GARMIN Customer Service
department (913-397-8200) for a returned merchandise tracking
number. The unit should be securely packaged with the tracking
number clearly marked on the outside of the package, and sent
freight prepaid and insured to a GARMIN warranty service station. A
copy of the original sales receipt is required as the proof of purchase
for warranty repairs. GARMIN retains the exclusive right to repair or
replace the unit or software at its sole discretion.
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 61
© 1998 GARMIN Corporation
1200 E. 151st Street, Olathe, KS 66062 USA
Web Site Address: www.garmin.com
GARMIN (Europe) Ltd. - Unit 5, The Quadrangle, Abbey Park, Romsey, Hampshire, SO51 9AQ, UK
GARMIN (Asia) Corp., 4th Fl., No. 1, Lane 45, Pao-Hsing Road, Hsin Tien, Taiwan R.O.C.
Part Number 190-00134-10 Rev. A Printed in Taiwan
®
GPS 12XL NEW Manual Rev A 2/6/98 3:18 PM Page 62
6

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