your best bet would be to go on to the navy sports website and look at their results of both dual meets and championship meets, if you fall somewhere in their with your times definitely send an email to the coach telling them of your interest
this is what i did for army swimming
to be 'noticed' by the coach, as in they call you before you reach out to them, you pretty much have to be such a super star that many other coaches are calling you as well, but you definitely do NOT have to be receiving calls to be recruited to the team
i was good enough to make a contribution to the program, and i let the coach know that i was interested and was then offered a recruiting trip, etc and was an official 'recruited athlete' in the admissions process, but i was NOT going to be contacted by the coach without my initial input
best of luck!
HM
USMA 2013, Go Army Swimming and Diving