HavardI sailed on the Staatsrad Lehmkuhl during the Tall Ships race last year. The captain (Marcus Seidl?) is a big Irish music fan. I remember him describing the Dubliners (the real ones - not the pub staff!) playing on the foredeck of the ship in Bergen. One of the watchleaders on the trip was a Norwegian music student who sang shanties very well.
Good luck with the session.
Regards