Submerged (2005) 深海潜龙

Submerged is a 2005 American action film written and directed by Anthony Hickox, and starring Steven Seagal, William Hope,Vinnie Jones and Christine Adams. The film was released on direct-to-DVD in the United States on May 31, 2005.

Chris Kody, the world's best mercenary, is freed from prison -- but there's a catch. Kody must use his lethal weapons and fighting skills to stop a group of terrorists who have taken over a nuclear sub.