<p>Our son is currently a youngster at the Naval Academy. He applied for (and did NOT get into) the summer seminar. What helped him the most was his participation in our local Sea Cadets chapter. It showed that he had some familiarity with the navy and that he wasn’t making this decision blindly. If you don’t have Sea Cadets nearby, then look into a Jr ROTC program.<br>
One more thing: I notice you mention “tennis” and tons of other (non-athletic) activities. If you don’t participate in any other sports, you might want to try that instead of “more community service.” USNA likes varsity athletes who are well rounded. But most importantly they like applicants who really want to be there and understand what they are getting themselves into. Good luck!</p>