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you calibrate tack assist, the device captures your boat's port
and starboard course over ground (COG) measurements,
and uses the COG data to calculate the mean true wind
direction and the boat's tack angle .
The device uses this data to determine whether your boat is
being lifted or headed due wind shifts.
By default, the device tack assist is set to automatic. Each time
you calibrate the port or starboard COG, the device recalibrates
the opposite side and true wind direction. You can change the
tack assist settings to enter a fixed tack angle or true wind
direction.
NOTE: The device uses GPS-based course over ground to
determine your course in the tack assist feature, and does not
account for other factors that can affect your boat's direction,
such as currents and tides.
Calibrating the Tack Assist
1
From the watch face, select MOB.
2
Select Sail Race or Sail.
3
Select UP or DOWN to view the tack assist screen.
NOTE: You may need to add the tack assist screen to the
data screens for the activity (Customizing the Data Screens,
page 33).
4
Select MOB.
5
Select an option:
• To calibrate the starboard side, select MOB.
• To calibrate the port side, select DOWN.
TIP: If the wind is coming from the starboard side of the
vessel, you should calibrate starboard. If the wind is coming
from the port side of the vessel, you should calibrate port.
6
Wait while the device calibrates the tack assist.
An arrow appears and indicates if your boat is being lifted or
headed.
Entering a Fixed Tack Angle or True Wind Direction
1
From the watch face, select MOB.
2
Select Sail Race or Sail.
3
Select UP or DOWN to view the tack assist screen.
4
Hold MENU.
5
Select Tack Angle or True Wind Direction.
6
Select Fixed.
7
Select UP or DOWN to set the value.
Tips for Getting the Best Lift Estimate
To get the best lift estimate when using the tack assist feature,
you can try these tips. See Entering a Fixed Tack Angle or True
Wind Direction, page 3 and Calibrating the Tack Assist, page 3
for more information.
• Enter a fixed tack angle, and calibrate the port side.
• Enter a fixed tack angle, and calibrate the starboard side.
• Use the Auto tack angle setting, and calibrate both the port
and starboard side.
Sail Racing
You can use the device to help you cross the start line of a race
exactly when the race begins. When you synchronize the
regatta timer in the sail racing app with the official race
countdown timer, you are alerted at one-minute intervals as the
race start approaches. When you set the starting line, the device
uses GPS data to indicate whether your boat will cross the start
line before, after, or at the correct time to start the race.
Setting the Starting Line
1
From the watch face, select MOB > Sail Race.
2
Wait while the device locates satellites.
3
Hold MENU.
4
Select Ping Start Line.
5
Select Mark Port to mark the port starting line mark as you
sail past it.
6
Select Mark Starboard to mark the starboard starting line
mark as you sail past it.
Starting a Race
Before you can view the time to burn, you must set the starting
line (Setting the Starting Line, page 3).
1
From the watch face, select MOB > Sail Race.
2
Wait while the device locates satellites.
The screen displays the regatta timer and time to burn .
3
Select MOB.
4
Select UP and DOWN to synchronize the regatta timer with
the official race countdown.
NOTE: When the burn time is negative, you will arrive at the
start line after the race starts. When the burn time is positive,
you will arrive at the start line before the race starts.
5
Select MOB to start the timer.
Setting the Sailing Units
1
From the watch face, select MOB > Sail Race.
2
Hold MENU.
3
Select the activity settings.
4
Select Nautical Units.
5
Select an option:
• To use nautical units for speed and distance, select On.
• To use the system units of measure for speed and
distance, select Use Sys. Settings.
Tides
Viewing the Tide Data
When you pair your device with a smartphone, you can
download up to seven days of tide data for your current location.
You can update your location and download new tide data by
selecting MOB from the tide screen.
1
From the watch face, select MOB > Tides.
A 24-hour tide chart appears, showing the high tides and
low tides for the current date.
Marine Activities 3
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