Story reminds me of College. ?-1975 Stevens had a small ship, used it for ~150 upper class men dorm rooms.
One day the wanabe engineers figured out how to start the engines and drop the lines, and drove off down the Hudson and out to sea.
When the Coast Guard boarded it, everybody was "sound asleep" in there dorms and nobody knew a thing.
The boat was brought back and the screws removed by divers.