Type IX submarine
Ship class
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The Type IX U-boat was designed by Nazi Germany's Kriegsmarine in 1935 and 1936 as a large ocean-going submarine for sustained operations far from the home support facilities. Wikipedia
Built: 1937 -1945
Complement: 48 to 56 (55 to 63 in Type IXD)
Speed: 33.7 km/h (18.2 kn) (surfaced); 14.3 km/h (7.7 kn) (submerged)
Test depth: 230 m (750 ft)