You go to sea in 4 submarines, one at a time. Your mission is to intercept and destroy six convoys of enemy ships, even though each convoy has a destroyer escort that can quickly find you and fire depth charges with deadly accuracy. Look through the periscope... aim at the ships, fire your torpedoes, then DIVE - DIVE! The chase is on! Featuring 5 skill levels to offer lots of challenge, and realistic sounds of battle to add excitement as you try to sink every ship in sight!