Name U-999 Yard number 199 Commissioned 21 October 1943 Launched 17 September 1943 Draft 4.74 m Builder Blohm + Voss | Ordered 14 October 1941 Laid down 19 December 1942 Construction started 19 December 1942 Length 67 m Beam 6.2 m | |
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Fate Scuttled on 5 May 1945 in Flensburg Fjord Part of 5th U-boat Flotilla, 6th U-boat Flotilla, 24th U-boat Flotilla, 31st U-boat Flotilla | ||
German submarine U-999 was a Type VIIC/41 U-boat of Nazi Germany's Kriegsmarine during World War II.
Contents
She was ordered on 14 October 1941, and was laid down on 19 December 1942 at Blohm & Voss, Hamburg, as yard number 199. She was launched on 17 September 1943 and commissioned under the command of Oberleutnant zur See Hermann Hansen on 21 October 1943.
Design
German Type VIIC/41 submarines were preceded by the heavier Type VIIC submarines. U-999 had a displacement of 769 tonnes (757 long tons) when at the surface and 871 tonnes (857 long tons) while submerged. She had a total length of 67.10 m (220 ft 2 in), a pressure hull length of 50.50 m (165 ft 8 in), an overall beam of 6.20 m (20 ft 4 in), a height of 9.60 m (31 ft 6 in), and a draught of 4.74 m (15 ft 7 in). The submarine was powered by two Germaniawerft F46 four-stroke, six-cylinder supercharged diesel engines producing a total of 2,800 to 3,200 metric horsepower (2,060 to 2,350 kW; 2,760 to 3,160 shp) for use while surfaced, two BBC GG UB 720/8 double-acting electric motors producing a total of 750 metric horsepower (550 kW; 740 shp) for use while submerged. She had two shafts and two 1.23 m (4 ft) propellers. The boat was capable of operating at depths of up to 230 metres (750 ft).
The submarine had a maximum surface speed of 17.7 knots (32.8 km/h; 20.4 mph) and a maximum submerged speed of 7.6 knots (14.1 km/h; 8.7 mph). When submerged, the boat could operate for 80 nautical miles (150 km; 92 mi) at 4 knots (7.4 km/h; 4.6 mph); when surfaced, she could travel 8,500 nautical miles (15,700 km; 9,800 mi) at 10 knots (19 km/h; 12 mph). U-999 was fitted with five 53.3 cm (21 in) torpedo tubes (four fitted at the bow and one at the stern), fourteen torpedoes, one 8.8 cm (3.46 in) SK C/35 naval gun, 220 rounds, and an anti-aircraft gun. The boat had a complement of between forty-four and fifty-two.
Service history
U-999 was scuttled in Flensburg Fjord on 5 May 1945, after participating in only one war patrol that yielded no ships sunk or damaged. The wreck was recovered and broken up in 1948.