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Sailing
Tack Assist
CAUTION
The watch 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. You are
responsible for the safe and prudent operation of your vessel.
While cruising or racing into the wind, the tack assist feature can help you determine if your boat is being lifted
or headed. When you calibrate tack assist, the watch 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 watch uses this data to determine whether your boat is being lifted or headed due to wind shifts.
By default, the tack assist feature is set to automatic. Each time you calibrate the port or starboard COG, the
watch 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.
Calibrating the Tack Assist
1 From the watch face, select START.
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, page36).
4 Select START.
5 Select an option:
• To calibrate the starboard side, select START.
• 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.
6 Marine Activities
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