<p>My S is in NROTC. If you do NROTC in college, you receive a commission to be a Naval officer upon graduation. There is a choice as to where you go but initially the choices are limited to Aviation, Submarines or Surface Warfare I believe. Your stats, data, and recommendations are sent in to a national ranking board and what you are assigned depends on your ranking. After you have served out your initial obligation in one of those 3 areas, you can extend your commission and request assignment to more specialized areas. The idea is that everybody’s first tour is dedicated to learning to be a Junior Officer.</p>