"The German Type 212 class, also Italian Todaro class, is a highly advanced design of non-nuclear submarine developed by Howaldtswerke-Deutsche Werft AG (HDW) for the German and Italian Navies. It features diesel propulsion and an additional air-independent propulsion (AIP) system using Siemens proton exchange membrane (PEM) compressed hydrogen fuel cells. The submarine can operate at high speed on diesel power or switch to the AIP system for silent slow cruising, staying submerged for up to three weeks without surfacing and with little exhaust heat. The system is also said to be vibration-free, extremely quiet and virtually undetectable.
Type 212 is the first fuel cell propulsion system equipped submarine series."
https://en.wikipedia.org/wiki/Type_212_submarine
Type 212 is the first fuel cell propulsion system equipped submarine series."
https://en.wikipedia.org/wiki/Type_212_submarine