The GermanType 212 is a highly advanced design of non-nuclear submarine (U-Boat) developed by Howaldtswerke-Deutsche Werft AG (HDW) for the German Navy. It features diesel propulsion and an additional air-independent propulsion (AIP) system using Siemens proton exchange membrane (PEM) 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 no exhaust heat. The system is alsosaid to be vibration-free, extremely quiet and virtually undetectable.
Type 212 is the first of the only two fuel cell propulsion system equipped submarines ready for series production by 2007, the other being the Project 677 Lada class submarine designed by Russian Rubin Design Bureau.
A upper hull
B lower hull
C fiberglass tape used to bond lower hull bow to upper hull
D tail-cone with installed shaft bearings, yokes and control surfaces
E lower hull forward radial flange
F longitudinal hull edge indexing tabs (long)
G longitudinal hull edge indexing tabs (long and short)
H SubDriver-to-hull indexing pin and Velcro strap foundation
I flood-drain hole marking stencil
J sailplane and fairing
K propeller dunce-caps
L sailplane and fairing
M SD foundation (2.5" SD)
N SD foundation (2.5" SD)
O SD foundation (2" SD)
P SD foundation (2" SD)
Q mast foundation
R seven-blade propeller
R2 six-blade propeller
S Velcro SD retaining strap
T 'Whatsit' mast
U periscope mast
V induction mast
