The best way is to send him/her an e-mail. Make it brief -- say that you're interested in USNA and list a couple key stats. Keep in mind that you have to be at least a junior to contact the coach.
There is not a commitment period. A coach can give an athlete three different levels of support. The highest level being the "blue chip". Given that you still need the nomination and the final Appointment - no true commitment is extended by either side.
There is not a commitment period. A coach can give an athlete three different levels of support. The highest level being the "blue chip". Given that you still need the nomination and the final Appointment - no true commitment is extended by either side.
From a printout that I received the levels are as follows:
1) Recommended Sport Recruit
2) Approved Sport Recruit
3) Blue Chip Athete