There is a page in TomTom where you can see your lat and long. If you have a map with you (which I hope you would - unless you got lost in the circuit area!) then yeah the TomTom can be a handy backup.
Agaricus bisporus - If I crashed and had mobile phone coverage then I'd like to be able to give the rescuers an accurate coordinate to pick me up from rather than putting all my faith in the ELT option. I believe the technical term for someone like you is d!ckhead.