Handleiding Garmin GPSMAP 8422 MFD (pagina 24 van 62) (Engels)

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countdown timer, you are alerted at one-minute intervals as the

race start approaches. When you combine the race timer with

the virtual start line, the device measures your speed, bearing,

and remaining time on the countdown timer. The device uses

this data to indicate whether your boat will cross the start line

before, after, or at the correct time to start the race.

Starting Line Guidance

Sailing start line guidance is a visual representation of the

information you need to cross the start line at the optimal time

and speed.

After you set the starboard and port start line pins, and the

target speed and time, and after you start the race timer, a

predictor line appears. The predictor line extends from your

current location toward the start line and the laylines that extend

from each pin.

The end point and color of the predictor line indicate where the

boat will be when the timer expires, based on your current boat

speed.

When the end point is before the start line, the line is white. This

indicates the boat must increase speed to reach the start line on

time.

When the end point is past the start line, the line is red. This

indicates the boat must reduce speed to avoid a penalty for

reaching the start line before the timer expires.

When the end point is on the start line, the line is white. This

indicates the boat is moving at an optimal speed to reach the

start line when the timer expires.

By default, the start line guidance window and the race timer

window appear in the Sail Racing combination screen.

Setting the Starting Line

The start line guidance window is added to the Sail Racing

combination screen by default.

From the Sail Racing combination screen, select Menu >

Start Line Guidance >

Start Line

Select an option:

• To mark the port and starboard starting line marks as you

sail past them, select

Ping Marks.

• To mark the port and starboard starting line marks by

entering their coordinates, select Enter Coordinates.

• To switch the position of the port and starboard marks

after you have set them, select

Swap Port & Starbd.

Marks.

Using the Starting Line Guidance

You can use the starting line guidance feature to help get you

cross the start line, at the optimal speed during a sailing race.

Mark the starting line (Setting the Starting Line,

page

16).

From the Sail Racing combination screen, select Menu >

Start Line Guidance >

Target Speed

, and select your target

speed when crossing the starting line.

Select

Target Time, and select the target time to cross the

starting line.

Select Back

Start the racing timer (Starting the Race Timer

, page

16).

Starting the Race Timer

The race timer is added to the Sail Racing combination screen

by default.

From the Sail Racing combination screen, select Start

NOTE: You can also access this from the Sailing

SmartMode

screen and the navigation chart.

When necessary, select Sync to synchronize with the official

race timer.

Stopping the Race Timer

From the Sail Racing combination screen, select Stop.

Setting the Distance between the Bow and the GPS

Antenna

You can enter the distance between the bow of your boat and

the location of your GPS antenna. This helps ensure the bow of

your boat crosses the starting line at the precise start time.

From a navigation chart, select Menu > Sailing > Start Line

> GPS Bow Offset.

Enter the distance.

Select

Done.

Laylines Settings

To use the laylines features, you must connect a wind sensor to

the chartplotter.

When in sailing mode (

Setting the Vessel Type, page 3), you

can display laylines on the navigation chart. Laylines can be

very helpful when racing.

From the navigation chart, select Menu

> Sailing > Laylines

Display: Sets how the laylines and vessel appear on the chart,

and sets the length of the laylines.

Sailing Ang.: Allows you to select how the device calculates

laylines. The

Actual option calculates the laylines using the

measured wind angle from the wind sensor. The Manual

option calculates the laylines using manually entered

windward and leeward angles.

Windward Ang.: Allows you to set a layline based on the

windward sailing angle.

Leeward Ang.: Allows you to set a layline based on the leeward

sailing angle.

Tide Correction: Corrects the laylines based on the tide.

Layline Filter: Filters the layline data based on the time interval

entered. For a smoother layline that filters out some of the

changes in the boat's heading or true wind angle, enter a

higher number. For laylines that display a higher sensitivity to

changes in the boat's heading or true wind angle, enter a

lower number.

Setting the Keel Offset

You can enter a keel offset to compensate the surface reading

for the depth of a keel, making it possible to measure depth from

the bottom of the keel instead of from the transducer location.

Enter a positive number to offset for a keel. You can enter a

negative number to compensate for a large vessel that may

draw several feet of water.

Complete an action, based on the location of the transducer:

• If the transducer is installed at the water line

, measure

the distance from the transducer location to the keel of the

boat. Enter this value in steps 3 and 4 as a positive

number.

• If the transducer is installed at the bottom of the keel

measure the distance from the transducer to the water

line. Enter this value in steps 3 and 4 as a negative

number.

16 Sailing Features

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