Objective: be the first entering opposing port with your battleship or sink enemy battleship - acting/moving by turns - each player gets 1 d6 and an additional die as route indicator, 6 mines, 12 small & 1 battleship; dice: 'a 4 combined with NO' = 4 transverse moves direction NO - protect your battleship with your small ships, place mines and try to surprise your opponent; moving upon or across an enemy ship is going to sink it. remarks: published 1930's