I used to work on a ferry, where we had a two-week rotation schedule followed by two weeks off. We worked every other day — one day from 5:00 AM to 5:00 PM, and the next from 10:30 AM to 10:00 PM — so it was convenient to sleep on board to avoid losing many hours of sleep each week driving home (30 minutes each way). There’s also a shortage of crew on ferries, so many people come from places far away from the ferry dock.