Yeah, what he said. Thanks, ejh.
TB, Things may have changed between your USN time and mine between 73 and 98. On my Belknap class CG, the First LT (an O-2 or O-3) was responsible for First Division, home of all the BMs and non-rated seamen. We owned all the Seamanship stuff, boats, fo'c'sle, unrep, and like that (including the liferaft canisters).
When I went to a CV, I had a couple of jobs in the Engineering Dept, so I tended to lose interest in the Deck guys. They had a First Div, Second Div, and up to 5th Div, all under the O-4 First Lt. I never figured out how they split their responsibilities. Then, as Chief Engineer on a frigate, I completely lost track of who's who up on the weather decks. My guys provided the engineer for the gig, and a BT to test the fuel to start an unrep, and otherwise we stayed out of the fresh air.