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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 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, page 31).
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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