Hi Dave -

The GPS rule is in there to prevent things like the Rock Box and other devices that signal where the line is, and devices that can signal when you're on a layline. The intention is to keep a race from becoming a video game. I get it, I just feel that the Puck does none of these things, but it does give me a durable, cost-effective unit that I can change the batteries in and download after a day of sailing to provide better debrief material. While sailing, it gives me a very visible and simple display of heading OR speed (have to pick one), which I have found useful.

Anyway - slippery slope and all... so I guess it is off the boat.