remember, the devise (GPS, cameras, etc.) not necessarily has to be very compact and don't have to swim and run with athlete - official install it in the morning before the race and it may fit in water bottle holder, helmet or have nice aerodynamic shape behind the seat or in front of the bar (which would be embraced by many on that forum : )... reception can be improved by antenna on the frame. As for the contr-action - it's cold war and companies will make profit of improving on it. Technology did help a lot many times - just think about 2500 athletes splits with a stopwatches . .
Hare Krishna
Hare Krishna