Shin Kaitei Gunkan
English title: Super Atragon
Japanese title: 新海底軍艦
Type: OVA
Episodes: 2
Source: Novel
Genres: Action, Adventure, Fantasy, Sci-Fi
Studios: Phoenix Entertainment
Producers: Kadokawa Shoten
Duration: 50 min per ep
Rating: PG-13 - Teens 13 or older

Moments after an atomic bomb falls over Hiroshima, a secret Japanese submarine sails into battle against its American counterpart, and both are lost to history. Some fifty years later, a special UN task force sent to investigate unusual phenomena in Antarctica is threatened by a mysterious black cylinder.

(Source: ANN)