No HT's on boats. Deck div doing topside work? Possibly--but it sounds like they were actually in the harbor (read: underway) in which case they'd be line handlers. Not bridge crew, even though everyone would be wearing harnesses and K-Vests.
No deck division either on subs.
Sometimes A-gangers, often TM's, and weapons (off-duty) ST's - Those are the guys working the weapoons launch and "outside-non-nuke mechanical" items, so they usually take care of it. Few onboard are rated under a PO3 by the time they reach the boat.