The Seabat: the most advanced nuclear submarine ever designed. Covertly developed by the U.S. and Japan, the Seabat is Japan\'s first nuclear submarine. During the shakedown cruise, the crew declare their sovereignty as an idependent nation, provoking a major international incident, and straining U.S.-Japanese relations to the breaking point. Now, the clock is ticking as both the U.S. and Japan scramble to capture the renegade submarine, or destroy it, as both nations prepare for war.

Based on the manga by Kaiji Kawaguchi

There is an OVA sequel, 2 60 minute episodes.