
The Type 212 submarine class was developed by German company Howaldtswerke-Deutsche Werft AG. Type 212 submarines can be powered by diesel propulsion and are air-independent. This type of submarine also uses Siemens proton exchange membrane compressed hydrogen fuel cells. As a result, they are able to operate in a variety of sea conditions, including extreme cold.
thyssenkrupp marine systems
Thyssenkrupp has signed an agreement to construct six Type 212CD submarines. The submarines are designed to be the world's most advanced non-nuclear submarines, according to the company. Construction of the first of these submarines could begin in 2023.
Currently there are six Type 212 submarines in the German Navy. Two additional Type 212 submarines are under construction in Norway as part of a joint project. The 5.5 billion Euro deal awarded to the German shipbuilder will result in six identical submarines for the German Navy and Norwegian navy.

Kongsberg defence & aerospace
The Norwegian and German navies reached an agreement to buy new Type 212CD submarines by Kongsberg defense & aerospace. This deal is part of a larger program that will continue into the 2030s. Both countries will work together on the development, procurement, and operation submarine missiles.
These contracts, which are worth 70 million euros and 72.9 millions euros, will equip future German- and Norwegian type 212CD submarines with the most advanced technology. These systems will provide submerged operations with the highest safety and capability.
German Navy
A German Navy sailor took a walkthrough video of the U34 submarine, a Type 212A air-independent-propulsion submarine, during the German-sponsored exercise Northern Coasts 2016. The U34 advanced non-nuclear submarine can be submerged for up three weeks and not resurfacing. It uses Siemens-developed hydrogen fuel cells that are compressed by proton exchange membranes.
The Type 212 submarine is the latest non-nuclear submarine in the German Navy's fleet. The submarine was designed in Kiel and has an independent propulsion powered with hydrogen fuel cells. It is believed to have a low noise signature and can be submerged for as long as three weeks without needing to surface. It has an "X" configuration that allows it to track aircraft and perform special operations.

Special Forces submarines
German submarine Type 212. It is a stealthy sub and has a top speed 23 mph. This submarine is designed to be a reconnaissance boat. Its armament is made up of torpedoes. It has six torpedo tube, which can each fire 13 533-millimeter DM2A4 Seahake grenades. The Type 212 can also carry 24 mines in addition to its torpedo tubes.
The Type 212 is manned by five officers and twenty-two sailors. It can operate in up to 17 meters of water and surface close to the shore. It also features a prismatic hull design, which makes it less likely to be detected by magnetic naval mines.