Back in the early 80’s aboard my DDG (Guided Missile Destroyer) a young seaman went biserk in port. He took a fog tip applicator used for fire fighting and beat the hell out of everything on the bridge. At the time I served duty as the Master at Arms and had to take him to the Naval Station brig. He just happened to have destroyed the electronics equipment (radar repeater) that I was responsible for maintaining. I asked him why he did it. His response, “I hate the Captain.” One lone sailor ... imagine what a lone whacked out sailor can do!
Sabotage happens and the bigger the ship the easier it is to conceal. And being in port was a whole lot tougher for a sailor than at sea. For thi7se who have never been to sea, its a sobering feeling, once the shore disappears, even nut jobs realize the ship is their only dry haven until they get back.