D.K.M. U 234
- Class: Type XB - 8 submarines
- Displacement: 1,763/2,177 tons
- Dimensions: 294.75 x 30 x 13.5 ft.
- Machinery: 2-shaft diesel/electric motors, B.H.P. 4,200/1,100 = 16.5/7 knots
- Radius: 14,550 miles at 12 knots / 93 miles at 4 knots
- Armament: 1-4.1 in., 1-37 mm, 1-20 mm A.A. guns; 2-21 in. T.T.(2 stern); 15 torpedoes and 66 mines in 30 shafts (24x2, 6x3)
- Complement: 52
- Builder: Germania Werft, Kiel
- Laid Down: 1 Oct 1941
- Commissioned: 2 Mar 1944
- Service: Designed as a mine-laying boat, but damaged by bombing during construction. Converted for use as special transport. Departed Norway 16 Apr 1945 for Japan carrying a disassembled Me-262 jet fighter, 550 kg of uranium ore, several German experts on V-weapons technology, and 2 Japanese officers. En route cease-fire orders were received, and she headed to the United States to surrender at Portsmouth, NH, on 16 May 1945, although the Japanese committed suicide before arrival. The boat was used by the USN for experimental purposes, and then sunk 20 Nov 1947 off Cape Cod.