Moss is the southernmost crossing of the Oslo fjord inside Norway, and a railway stop on railways services leading to southern Scandinavia.
Bastø Fosen
(http://www.basto-fosen.no) +44 33 03 17 40 Runs two ferries every 30 minutes between 5 and midnight, and the crossing to the town of Horten on the other side of the fjord, takes 30 minutes.