Sen Toku I-400

The Sen Toku I-400 is a DLC submarine in Steel Diver: Sub Wars. It was added to the Shop on Valentine's Day 2014 (February 14, 2014), one day after the game came out. It is one of three Japanese submarines featured in the game.

Using 2 Gunslingers can reduce reload to 3,which is the same as the delay inbetween torpedoes.

The Sen Toku I-400 was a Japanese submarine that came into service at the end of WW2. It was the largest submarine of its time, being twice the size of a German U-Boat. It was designed to act as an underwater aircraft carrier, holding three custom-built divebombers that would be launched once the submarine had surfaced. Such functionality would not be tested in battle before the war ended.