Submarine 707 (サブマリン707) is a Japanese manga series written and illustrated by Satoru Ozawa and serialized in Weekly Shōnen Sunday between 1963 and 1965.[1] The manga series was adapted into two original video animations (OVA). The first OVA, titled Submarine 707: Deep Sea Fleet (深海の艦隊 サブマリン707), was produced by Knack Productions and released on 10 January 1997. The second OVA, titled Submarine 707R (サブマリン707R), consisted of two episodes produced by Group TAC and was released between 26 September 2003 and 28 April 2004.
Plot
In the near future, the world is at war: the USR (the Undersea Silence Revolution or Underwater Silence Revolution), a mysterious organization led by Admiral Red and his powerful submarine UX, wants to stop human exploitation of the seas, using cutting-edge technology to torpedo and sink many ships and ports. The world's navies unite and form the Peace-Keeping Navy (PKN) to fight against the "terrorists". Every major UN member contributes a submarine, although the Japanese entry is an old clunker, the diesel sub 707 commanded by Captain Youhei Hayami. When the inaugural meeting finally begins, Admiral Red and the UX come to disrupt the meeting with a spread of torpedoes; due to a lack of command procedure and an unwise tight grouping of the PKN vessels, they are unable to fight back without damaging their own craft. Arriving late in the battle, Captain Hayami deliberately steers the 707 into the way of a torpedo launched at the supercarrier that serves as the PKN's flagship. His ship is destroyed, but the flagship, Captain Hayami and the 707 's crew survive.