The units that FLIR is marketing to the recreational boating community, the Voyager and the Navigator, are intended for large sail and power vessels, so the racing sailor may not be interested at first because of their size and weight. FLIR does, however, sell a handheld, monocular version of its sensor, the ThermoVision FlashSight, which is now used by fire and police departments. I suggested to the FLIR representatives that a waterproof version would probably be well received by racers and cruisers alike. Of course, you don't have to wait; you can buy the FlashSight for $ 9,900. Expensive, but imagine being able to keep track of the competition's every move, even every sail change, well after the sun goes down.