viv hit most of it. Special selections (ie SPEC WAR, SPEC OPS, Marines, Med Corps, Intel, Crypto, etc) require special selection processes. For the majority, however, that go Subs (need that Nuke interview with Head of Naval Reactors I think it is), SWO, Pilot, NFO, etc, big things they look at are grades, the ASTB for pilots and NFOs, and an interview you have with 3 or 4 officers on the yard, one of whom is a senior officer from the community you'd like to enter. Grades count the most, and when I say grades I mean your overall order of merit, to include academics and military (military has a lot, ie PE classes, the PRT, Conduct, Performance, etc). That's about it though, nothing real cosmic.