We race keel boats around the cans every weekend and were fed up of getting the spinnaker launch on the wrong side. Wotac solves the problem. Dial in the course and the wind and Wottac reliable [...]
wot-tac explained
Using the wot-tac is simple.
First, find the bearing of the true wind direction.
Second, set the bearing into the dial, which clicks every five degrees and then