Except for the 1988 copyright, I would have sworn that someone had dropped me a copy from some forgotten warehouse. Play takes place on an eleven by eleven gridded board. Several squares are marked as bonus squares which allow players to take extra moves. Each player is armed with vessels of three types - submarines, destroyers, and battleships. Each piece has a distinct movement pattern.
Submarines move in a straight line in any direction.
Destroyers move orthogonally and may change direction after each square of movement. Battleships may move in any direction and may change direction after each square of movement. The goal of the game is to destroy your opponent's entire fleet. The opponents vessels are destroyed by moving to or through the square containing their vessel. The game hinges around identifying, learning, and abusing certain key patterns of movement.