It's high seas naval warfare at its best. Take the helm of the R.M.S. Triumphant, the highly modified T-class submarine, armed to the teeth with devastating torpedoes and powerful deck guns. Skim the surface at periscope depth, dive deep to avoid depth charges, and emerge to do battle with shore gun emplacements and enemy ships. Bring all weapons to bear with easy-to-learn controls in fast-paced naval engagement that capture all the excitement of submarine warfare.  Engage enemy ships, aircraft, and floating mines in arcade-style battles.