During the waiting period, some people are getting a few credits courtesy of Navy Postgrad. Most people just form up for PT/muster each morning until you class up. Occasionally you get stuck with a stash job that might last anywhere from 1 day to the day you class up, it just depends. Also, there are so many people in the program that if you get attrited out of OCS or something similar, then you are just discharged from the military. If you had an NROTC scholarship or went to the Academy, then you will redesignate to General Aviation, or SWO. For the Marines you would just go back to a ground position.