| History | |
|---|---|
 Nazi Germany | |
| Name | U-1227 |
| Ordered | 14 October 1941 |
| Builder | Deutsche Werft, Hamburg |
| Yard number | 390 |
| Laid down | 1 February 1943 |
| Launched | 18 September 1943 |
| Commissioned | 8 December 1943 |
| Decommissioned | 10 April 1945 |
| Fate | Scuttled on 3 May 1945. Later raised and broken up. |
| General characteristics | |
| Class and type | Type IXC/40 submarine |
| Displacement | |
| Length |
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| Beam |
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| Height | 9.60 m (31 ft 6 in) |
| Draught | 4.67 m (15 ft 4 in) |
| Installed power |
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| Propulsion |
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| Speed |
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| Range |
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| Test depth | 230 m (750 ft) |
| Complement | 4 officers, 44 enlisted |
| Armament |
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| Service record[1][2] | |
| Part of: |
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| Identification codes: | M 54 328 |
| Commanders: |
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| Operations: |
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| Victories: |
1 warship total loss (1,370 tons) |
German submarine U-1227 was a Type IXC/40 U-boatofNazi Germany's Kriegsmarine during World War II.
The submarine was laid down on 1 February 1943 at the Deutsche Werft yard at Hamburg, launched on 18 September 1943, and commissioned on 8 December 1943 under the command of Oberleutnant zur See Friedrich Altmeier. The U-boat then served with 31st U-boat Flotilla, a training unit, with 2nd U-boat Flotilla from 1 August until 31 December 1944, and with 33rd U-boat Flotilla from 1 January until 10 April 1945.[1]
German Type IXC/40 submarines were slightly larger than the original Type IXCs. U-1227 had a displacement of 1,144 tonnes (1,126 long tons) when at the surface and 1,257 tonnes (1,237 long tons) while submerged.[3] The U-boat had a total length of 76.76 m (251 ft 10 in), a pressure hull length of 58.75 m (192 ft 9 in), a beam of 6.86 m (22 ft 6 in), a height of 9.60 m (31 ft 6 in), and a draught of 4.67 m (15 ft 4 in). The submarine was powered by two MAN M 9 V 40/46 supercharged four-stroke, nine-cylinder diesel engines producing a total of 4,400 metric horsepower (3,240 kW; 4,340 shp) for use while surfaced, two Siemens-Schuckert 2 GU 345/34 double-acting electric motors producing a total of 1,000 shaft horsepower (1,010 PS; 750 kW) for use while submerged. She had two shafts and two 1.92 m (6 ft) propellers. The boat was capable of operating at depths of up to 230 metres (750 ft).[3]
The submarine had a maximum surface speed of 18.3 knots (33.9 km/h; 21.1 mph) and a maximum submerged speed of 7.3 knots (13.5 km/h; 8.4 mph).[3] When submerged, the boat could operate for 63 nautical miles (117 km; 72 mi) at 4 knots (7.4 km/h; 4.6 mph); when surfaced, she could travel 13,850 nautical miles (25,650 km; 15,940 mi) at 10 knots (19 km/h; 12 mph). U-1227 was fitted with six 53.3 cm (21 in) torpedo tubes (four fitted at the bow and two at the stern), 22 torpedoes, one 10.5 cm (4.13 in) SK C/32 naval gun, 180 rounds, and a 3.7 cm (1.5 in) Flak M42 as well as two twin 2 cm (0.79 in) C/30 anti-aircraft guns. The boat had a complement of forty-eight.[3]
U-1227 completed only one combat patrol, from 14 September until 26 December 1944. On 4 October 1944 she attempted to attack a convoy at night, but was seen in the bright moonlight and counter-attacked by convoy escorts. She torpedoed one of the escorts, the Canadian River-class frigate HMCS Chebogue, during the pursuit. The frigate was a total loss, but the U-boat escaped and continued its patrol.[4]
U-1227 was damaged at Kiel in a British night-bombing raid on 9 April 1945, and was decommissioned there on 10 April. U-1227 was scuttled to avoid capture on 3 May 1945.[1]
| Date | Ship Name | Nationality | Tonnage[Note 1] | Fate[5] |
|---|---|---|---|---|
| 4 October 1944 | HMCS Chebogue |  Royal Canadian Navy
|
1,370 | Total loss |
