U212

The U212-class submarines have been designed to be powered by hydrogen fuel cells instead of traditional atmosphere-dependent propulsion systems. The new submarines will be quietest than previous German models and will be able to stay submerged for longer periods of time. The fuel cells will provide to conventional submarines some features only available for nuclear-powered vessels. The fuel cell propulsion system based on hydrogen allows the boat to cruise submerged for weeks, typically a diesel-powered submarine can remain submerged for only two days. Fuel Cells generates no noise and no exhaust heat. The Portuguese and Greek Navies have ordered the German hydrogen fuel cell propulsion system for three of their U209-class submarines on order or already in service. The U212-class is an evolution of proven U209 submarines. The new submarine will be armed with the DM2A4 torpedo and will perform shallow water and open sea missions. It will feature six 533mm torpedo tubes and 12 torpedoes or 24 mines.

deagel.com: https://www.deagel.com/x/x/a000455