A big battle developes on a cobalt blue sea. Fire a torpedo when you find the enemy's ships. Avoid the destroyer's attack by using your missiles, torpedoes and depth bombs. Counter-attack and sink the enemy's ships. The enemy attack becomes more intense with each new round.
These SG-1000 games play on the SC-3000, SG-1000 and Mark III consoles as well as the Japanese Sega Master System