Tack Assist


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 Callout number 1 and starboard Callout number 2 course over ground (COG) measurements, and uses the COG data to calculate the mean true wind direction Callout number 3 and the boat's tack angle Callout number 4.

Tack assist diagram with callouts

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.

GUID-69467D38-DE67-4A49-A78A-F7C809EFF8B5 v5
November 2023