SM U-83

History
German Empire
Name:	U-83
Ordered:	23 October 1915
Builder:	Germaniawerft, Kiel
Yard number:	253
Launched:	13 July 1916
Commissioned:	6 September 1916
Fate:	Sunk by gunfire of Q-Ship Farnborough SW of Ireland at 51°34′N 11°23′W / 51.567°N 11.383°W / 51.567; -11.383Coordinates: 51°34′N 11°23′W / 51.567°N 11.383°W / 51.567; -11.383, 17 February 1917. 35 dead and 2 survivors.
General characteristics
Displacement:	808 t (795 long tons) surfaced 946 t (931 long tons) submerged
Length:	70.06 m (229 ft 10 in) (o/a) 55.55 m (182 ft 3 in) (pressure hull)
Beam:	6.30 m (20 ft 8 in) (oa) 4.15 m (13 ft 7 in) (pressure hull)
Height:	8.00 m (26 ft 3 in)
Draught:	4.02 m (13 ft 2 in)
Installed power:	2 × 2,400 PS (1,765 kW; 2,367 shp) surfaced 2 × 1,200 PS (883 kW; 1,184 shp) submerged
Propulsion:	2 shafts, 2 × 1.70 m (5 ft 7 in) propellers
Speed:	16.8 knots (31.1 km/h; 19.3 mph) surfaced 9.1 knots (16.9 km/h; 10.5 mph) submerged
Range:	11,220 nmi (20,780 km; 12,910 mi) at 8 knots (15 km/h; 9.2 mph) surfaced 56 nmi (104 km; 64 mi) at 5 knots (9.3 km/h; 5.8 mph) submerged
Test depth:	50 m (160 ft)
Complement:	4 officers, 31 enlisted
Armament:	6 × 50 cm (19.7 in) torpedo tubes (four bow, two stern) 12-16 torpedoes 1 × 10.5 cm (4.1 in) deck gun
Service record
Part of:	Kaiserliche Marine IV Flotilla 31 October 1916 – 17 February 1917
Commanders:	Kapitänleutnant Bruno Hoppe 6 September 1916 – 17 February 1917
Operations:	2
Victories:	5 merchant ships sunk (6,286 GRT)

SM U-83 was a Type U 81 u-boat of the German Imperial Navy (German: Kaiserliche Marine) during the First World War. She had been commissioned and deployed to operate off the coast of the British Isles and attack coastal shipping as part of the German U-boat campaign.

In a six-month career, U-83 made two combat patrols into the South-Western Approaches during the Atlantic campaign. In these patrols she sank five allied merchant ships for 6,286 gross register tons (GRT). On 17 February 1917, she torpedoed the British Q-ship HMS Farnborough off the Irish coast, but was sunk by Farnborough's hidden armaments when she approached too close. There were just 2 survivors, picked up by Farnborough; 35 of her crew perished. Farnborough was commanded by the submarine hunter Gordon Campbell and had on board later Victoria Cross recipients Ronald Niel Stuart and William Williams.

German Type U 81 submarines were preceded by the shorter Type UE I submarines. U-83 had a displacement of 808 tonnes (795 long tons) when at the surface and 946 tonnes (931 long tons) while submerged. She had a total length of 70.06 m (229 ft 10 in), a pressure hull length of 55.55 m (182 ft 3 in), a beam of 6.30 m (20 ft 8 in), a height of 8 m (26 ft 3 in), and a draught of 4.02 m (13 ft 2 in). The submarine was powered by two 2,400 metric horsepower (1,800 kW; 2,400 shp) engines for use while surfaced, and two 1,200 metric horsepower (880 kW; 1,200 shp) engines for use while submerged. She had two propeller shafts. She was capable of operating at depths of up to 50 metres (160 ft).

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