German submarine U-779

	U-570 Type VIIC submarine that was captured by the British in 1941. This U-boat is almost identical to U-779.
History
Nazi Germany
Name	U-779
Ordered	20 January 1941
Builder	Kriegsmarinewerft, Wilhelmshaven
Yard number	162
Laid down	21 July 1943
Launched	17 June 1944
Commissioned	24 August 1944
Fate	Surrendered on 5 May 1945; sunk as part of Operation Deadlight on 17 December 1945
General characteristics
Class and type	Type VIIC submarine
Displacement	769 tonnes (757 long tons) surfaced; 871 t (857 long tons) submerged;
Length	67.10 m (220 ft 2 in) o/a; 50.50 m (165 ft 8 in) pressure hull;
Beam	6.20 m (20 ft 4 in) o/a; 4.70 m (15 ft 5 in) pressure hull;
Height	9.60 m (31 ft 6 in)
Draught	4.74 m (15 ft 7 in)
Installed power	2,800–3,200 PS (2,100–2,400 kW; 2,800–3,200 bhp) (diesels); 750 PS (550 kW; 740 shp) (electric);
Propulsion	2 shafts; 2 × diesel engines; 2 × electric motors;
Speed	17.7 knots (32.8 km/h; 20.4 mph) surfaced; 7.6 knots (14.1 km/h; 8.7 mph) submerged;
Range	8,500 nmi (15,700 km; 9,800 mi) at 10 knots (19 km/h; 12 mph) surfaced; 80 nmi (150 km; 92 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged;
Test depth	220 m (720 ft); Crush depth: 250–295 m (820–968 ft);
Complement	4 officers, 44–52 enlisted
Armament	5 × 53.3 cm (21 in) torpedo tubes (four bow, one stern); 14 × torpedoes or; 26 TMA mines; 1 × 8.8 cm (3.46 in) deck gun (220 rounds); 1 × 3.7 cm (1.5 in) Flak M42 AA gun ; 2 × twin 2 cm (0.79 in) C/30 anti-aircraft guns;
Service record
Part of:	31st U-boat Flotilla; 24 August 1944 – 5 May 1945;
Identification codes:	M 17 108
Commanders:	Oblt.z.S. Johann Stegmann; 24 August 1944 – 5 May 1945;
Operations:	None
Victories:	None

German submarine U-779 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine during World War II.

She was ordered on 20 January 1941, and was laid down on 21 July 1943, at Kriegsmarinewerft, Wilhelmshaven, as yard number 162. She was launched on 17 June 1944, and commissioned under the command of Oberleutnant zur See Johann Stegmann on 24 August 1944.^[2]

Design

German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-779 had a displacement of 769 tonnes (757 long tons) when at the surface and 871 tonnes (857 long tons) while submerged.^[3] 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), a 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 Garbe, Lahmeyer & Co. RP 137/c 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).^[3]

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).^[3] 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-779 was fitted with five 53.3 cm (21 in) torpedo tubes (four fitted at the bow and one at the stern), fourteen torpedoes or 26 TMA mines, one 8.8 cm (3.46 in) SK C/35 naval gun, (220 rounds), one 3.7 cm (1.5 in) Flak M42 and two twin 2 cm (0.79 in) C/30 anti-aircraft guns. The boat had a complement of between 44 — 52 men.^[3]

Service history

U-779 did not participate in any war patrols.^[2]

On 5 May 1945, U-779 surrendered at Cuxhaven, Germany. She was later transferred to Loch Ryan, Scotland on 24 June 1945, from Wilhelmshaven. Of the 156 U-boats that eventually surrendered to the Allied forces at the end of the war, U-779 was one of 116 selected to take part in Operation Deadlight. U-779 was towed out and sank on 17 December 1945, by gunfire from the British destroyer HMS Onslow and the frigate HMS Cubitt.^[2]

The wreck now lies at 55°50′N 10°05′W / 55.833°N 10.083°W / 55.833; -10.083.^[2]

References

^ Helgason, Guðmundur. "Johann Stegmann". German U-boats of WWII - uboat.net. Retrieved 3 April 2016.
^ ^a ^b ^c ^d Helgason, Guðmundur. "U-779". German U-boats of WWII - uboat.net. Retrieved 3 April 2016.
^ ^a ^b ^c ^d Gröner 1991, pp. 43–46.

Bibliography

Busch, Rainer; Röll, Hans-Joachim (1999). German U-boat commanders of World War II : a biographical dictionary. Translated by Brooks, Geoffrey. London, Annapolis, Md: Greenhill Books, Naval Institute Press. ISBN 1-55750-186-6.
Busch, Rainer; Röll, Hans-Joachim (1999). Der U-Boot-Krieg, 1939-1945: Deutsche U-Boot-Verluste von September 1939 bis Mai 1945 [German U-boat losses from September 1939 to May 1945] (in German). Vol. IV. Hamburg, Berlin, Bonn: Mittler. ISBN 3-8132-0514-2.
Gröner, Eric; Jung, Dieter; Maass, Martin (1991). German Warships 1815-1945: U-boats and Mine Warfare Vessels. Vol. 2. Translated by Thomas, Keith; Magowan, Rachel. London: Conway Maritime Press. ISBN 0-85177-593-4.