Port/Starboard, but there has been talk of going one and three, we tried it last year, but the way they did it we didnt get any time off because we always had a pager with us. It was first boat, second boat, dayworker.
Hated 1-3, loved P/W with sliding weekends. With P/S there were enough people in the sections that you had a two boat response. If they needed more calling people in was an option as well. Now that you have the 47's response time going to is great but coming back with a tow is always slow.