[russell]

there is absolutely no way gps would work. It would be easy to do, but a gps cant possibly get within two feet. Even with all of the new corrective systems a gps can only be accurate to about three meters which is like ten feet. And the competitions all take place in giant metal buildings. And even if you managed to get a perfect usable signal you would still only be able to tell generally which part of the field you are in. A radius of ten feet means that only if you were in the very center of the field would it necessarily show you as even being on the field at all.