Garmin ECHOMAP PLUS 40 Series Owner's Manual page 33

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
1
From the starting line guidance gauge, select MENU > Start
Line.
2
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 & Strbd..
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.
1 Mark the starting line (Setting the Starting Line, page
2
From the Start Line Guidance gauge, select MENU > Target
Speed, and select your target speed when crossing the
starting line.
3
Select Target Time, and select the target time to cross the
starting line.
4
Select BACK.
5
Start the racing timer (Using the Race Timer, page
Using the Race Timer
1 From the starting line guidance gauge, select
the timer.
2
Select SELECT to start and stop the timer.
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.
1
From the starting line guidance gauge, select MENU > Start
Line > GPS Bow Offset.
2
Enter the distance.
3
Select SELECT.
Sailing Features
Laylines Settings
To use the laylines features, you must connect a wind sensor to
the chartplotter.
When in sailing mode
can display laylines on the navigation chart. Laylines can be
very helpful when racing.
From the navigation chart, select MENU > Laylines.
Display: Sets how the laylines and vessel appear on the chart,
and sets the length of the laylines.
Sailing Angle: 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 Angle: Allows you to set a layline based on the
windward sailing angle.
Leeward Angle: Allows you to set a layline based on the
leeward sailing angle.
Tide Correction: Corrects the laylines based on the tide.
Filter Time Constant: 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 water depth
reading for the transducer installation location. This allows you
to view the depth of the water below the keel or the true depth of
the water, depending on your needs.
If you want to know the water depth below the keel or the lowest
point of your boat and the transducer is installed at the water
line or anywhere above the end of the keel, measure the
distance from the transducer location to the keel of the boat.
If you want to know the true water depth and the transducer is
installed below the water line, measure the distance from the
bottom of the transducer up to the water line.
NOTE: This option is only available when you have valid depth
data.
27).
1
Measure the distance:
• If the transducer is installed at the water line
anywhere above the end of the keel, measure the
distance from the transducer location to the keel of the
boat. Enter this value as a positive number.
• If the transducer is installed at the bottom of the keel
and you want to know the true depth of the water,
27).
measure the distance from the transducer to the water
line. Enter this value in as a negative number.
or to set
(Setting the Vessel Type, page 3), you
or
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