German submarine U-180


German submarine U-180 was a Type IX submarine#Type IXD|Type IXD1] transport U-boat of Nazi Germany's Kriegsmarine which served in World War II. Her keel was laid down on 25 February 1941 at the DeSchiMAG AG Weser yard in Bremen as yard number 1020. She was launched on 10 December 1941 and commissioned on 16 May 1942 under Fregattenkapitän Werner Musenberg. Stripped of torpedo armament, the Type IXD1s were designated as transport submarines, and could carry up to 252 tonnes of freight. U-180 was used primarily in clandestine operations.

Design

were considerably larger than the original Type IXs. U-180 had a displacement of when at the surface and while submerged. The U-boat had a total length of, a pressure hull length of, a beam of, a height of, and a draught of. The submarine was powered by two MAN M 9 V 40/46 supercharged four-stroke, nine-cylinder diesel engines plus two MWM RS34.5S six-cylinder four-stroke diesel engines for cruising, producing a total of for use while surfaced, two Siemens-Schuckert 2 GU 345/34 double-acting electric motors producing a total of for use while submerged. She had two shafts and two propellers. The boat was capable of operating at depths of up to.
The submarine had a maximum surface speed of and a maximum submerged speed of. When submerged, the boat could operate for at ; when surfaced, she could travel at. U-180 was fitted with six torpedo tubes, 24 torpedoes, one SK C/32 naval gun, 150 rounds, and a SK C/30 with 2575 rounds as well as two C/30 anti-aircraft guns with 8100 rounds. The boat had a complement of fifty-five.

Service history

First patrol

U-180 sailed from Kiel on 8 February 1943, with the leader of the Indian National Army Netaji Subhas Chandra Bose and his aide Abid Hasan aboard.
On 18 April U-180 sank the British 8,132 GRT tanker Corbis about east southeast of Port Elizabeth, South Africa. Nine days later, on 27 April, the boat made her rendezvous with the Imperial Japanese Navy, just east of Madagascar in the Indian Ocean, Bose and Hassan boarded I-29 and two Japanese naval officers, both shipbuilding officers, Captains Emi Tetsushiro and Tomonaga Hideo, who were to study U-boat building techniques upon their arrival in Germany, boarded U-180. Bose and Hasan's transfer is the only known record of a civilian transfer between two submarines of two different navies in World War II. Also received were two tonnes of gold ingots as payment from Japan for weapons technology.
On the return voyage, U-180 sank the Greek freighter Boris west of Ascension Island on 3 June 1943.
During this voyage, U-180 was supplied by on the way to the exchange. She was supposed to be refueled by on the way back, but that boat was sunk by the British on 16 May 1943. On 19 June, U-180 was refueled by.

Second patrol and loss

Under the command of Oberleutnant zur See Rolf Riesen, U-180 sailed from Bordeaux on 20 August 1944 bound for Japan. She was reported sunk off the Bay of Biscay on 23 August 1944, with the loss of all of her 56 crew. The official verdict is "sunk by a mine", however, some experts speculate that trouble with the schnorkel, may have been the cause.

Summary of raiding history

Media