German submarine U-149 (1940)

German submarine U-149 was a Type IID U-boat of Nazi Germany's Kriegsmarine during World War II. Her keel was laid down on 25 May 1940 by Deutsche Werke in Kiel as yard number 278. She was launched on 19 October 1940 and commissioned on 13 November with Kapitänleutnant Horst Höltring in command.

U-149 began her service life with the 1st U-boat Flotilla. She was then assigned to the 22nd flotilla, where she remained for the rest of the war, including time on a single patrol.

She surrendered on 5 May 1945 and was sunk as part of Operation Deadlight on 21 December.

Design
German Type IID submarines were enlarged versions of the original Type IIs. U-149 had a displacement of 314 t when at the surface and 364 t while submerged. Officially, the standard tonnage was 250 LT, however. The U-boat had a total length of 43.97 m, a pressure hull length of 29.80 m, a beam of 4.92 m, a height of 8.40 m, and a draught of 3.93 m. The submarine was powered by two MWM RS 127 S four-stroke, six-cylinder diesel engines of 700 PS for cruising, two Siemens-Schuckert PG VV 322/36 double-acting electric motors producing a total of 410 PS for use while submerged. She had two shafts and two 0.85 m propellers. The boat was capable of operating at depths of up to 80 - 150 m.

The submarine had a maximum surface speed of 12.7 kn and a maximum submerged speed of 7.4 kn. When submerged, the boat could operate for 35 - 42 nmi at 4 kn; when surfaced, she could travel 3800 nmi at 8 kn. U-149 was fitted with three 53.3 cm torpedo tubes at the bow, five torpedoes or up to twelve Type A torpedo mines, and a 2 cm anti-aircraft gun. The boat had a complement of 25.

Operational career
U-149's one patrol was carried out within the confines of the Baltic Sea, but she did sink the Soviet submarine M-99 on 27 July 1941, north-west of Dagö Island before returning to her base at Gotenhafen, (now Gdynia in modern Poland).

Fate
The boat surrendered at the German island of Heligoland on 5 May 1945. She was transferred from Wilhelmshaven to Loch Ryan in preparation for Operation Deadlight and was sunk on 21 December 1945 at 55.66667°N, -8°W.