EM1
Forsan et haec olim meminisse iuvabit
I knew that supply officers on SSNs were DH's... is that true on SSBNs too?
Yes. A bit of a stretch if you ask me, but it is a pretty big program they're expected to run.
As an aside, all the one's I've worked with have been on their second or third sea tour by the time they get to a boat (usually the first tour or two is on a surface ship).