Tack!

Displays the information sailors need to be first to the windward mark. Displays the current heading and lets you know if you are lifted or headed, and by how much. Also displays boat speed over ground in knots and has a countdown timer.

No more remembering angles or writing on your boat with dry erase markers. No more spending hundreds of dollars on electronic tactical compasses. Use the compass /computer you carry in your pocket to calculate your angle off of the wind. The only task required of the user is to input the angle you tack through and click a button during a windshot (or when the boat is pointing at the heading displayed on the race committee boat).