Deck in Space.

The next department on a ship to talk about is Deck. Deck Department is rather the odd-jobs area of responsibility. In the modern navy Deck Department makes sure the hull of the ship is rust-free, both what’s visible above the waterline and any deck (floor) visible outside the ship as well as directing extra personnel needed from other departments in huge jobs such as mooring the ship or underway replenishments where supplies and fuel is transferred from a cargo ship to a working ship in the middle of the ocean. Deck Department is also responsible for the rails and lifelines that circle the ship to keep personnel on ship and most of the watches outside the hull of the ship underway. Deck members are the ones on rotating shifts watching for people that fall overboard or for ships or planes that are visible. Anything the lookouts see gets radioed up to the bridge and they react accordingly.
In the future Deck Department may disappear but if they don’t than Deck could be responsible for any repairs or upgrades needed on the hull as well as replacing deck plates inside the ship, maybe even doing any maintenance needed on the exits from the ship to space or other ships
(airlocks) and escape pods.