My stepson was a Hull Technician. His mom asked what he did and he said, "Basically mom I am the ship's plumber".
After basic he was assigned to Pearl on a guided missile cruiser. He arrived at the bas the day AFTER his ship was de-commissioned for complete overhaul! Spent three and a half years living off base in Honolulu and the only time they went to sea one of the boilers shot craps and they had to be towed back to Pearl!
~~~GrayBeard~~~