From the box,
"Exciting naval-action and strategy game for all ages. Fun and easy to play! Use radar or sonar to seek-and-destroy your opponent's ship before he sinks yours. When the enemy attacks, use your superior seamanship to manuever your ship out of danger. Arm and fire your missles to destroy the enemy."
"Two exciting games of seamanship-play computerized Sonar Battleship or Nuclear Subs."