German submarine U-102 (1940)

U-52, a typical Type VIIB boat
History
Nazi Germany
Name:	U-102
Ordered:	15 December 1937
Builder:	Germaniawerft, Kiel Ship yard number=596
Laid down:	22 May 1939
Launched:	21 March 1940
Commissioned:	27 April 1940
Fate:	Sunk south-west of Ireland on 1 July 1940, by a British warship
General characteristics
Class and type:	Type VIIB submarine
Displacement:	753 tonnes (741 long tons) surfaced 857 t (843 long tons) submerged
Length:	66.50 m (218 ft 2 in) o/a 48.80 m (160 ft 1 in) pressure hull
Beam:	6.20 m (20 ft 4 in) o/a 4.70 m (15 ft 5 in) pressure hull
Height:	9.50 m (31 ft 2 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
Range:	8,700 nmi (16,100 km; 10,000 mi) at 10 knots (19 km/h; 12 mph) surfaced 90 nmi (170 km; 100 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth:	220 m (720 ft) Crush depth: 230–250 m (750–820 ft)
Complement:	4 officers, 40–56 enlisted
Sensors and processing systems:	Gruppenhorchgerät
Armament:	5 × 53.3 cm (21 in) bow torpedo tubes 14 × torpedoes or 26 TMA mines 1 × 8.8 cm (3.5 in) deck gun with 220 rounds 1 × 2 cm (0.79 in) C/30 anti-aircraft gun
Service record
Part of:	Kriegsmarine: 7th U-boat Flotilla
Commanders:	Kptlt. Harro von Klot-Heydenfeldt
Operations:	22 June – 1 July 1940
Victories:	Two ships sunk (5,430 GRT)

Germaniawerft, Kiel

German submarine U-102 was a Type VIIB submarine of Nazi Germany's Kriegsmarine during World War II.

The U-boat was laid down on 22 May 1939 at the Friedrich Krupp Germaniawerft shipyard at Kiel as yard number 596, launched on 21 March 1940 and commissioned on 27 April under the command of Kapitänleutnant Harro von Klot-Heydenfeldt to serve with the 7th U-boat Flotilla from 27 April 1940 to 1 June for crew training and operationally until she was sunk on 1 July. She sank two Allied ships, claiming 5,430 gross register tons (GRT).

German Type VIIB submarines were preceded by the shorter Type VIIA submarines. U-102 had a displacement of 753 tonnes (741 long tons) when at the surface and 857 tonnes (843 long tons) while submerged. She had a total length of 66.50 m (218 ft 2 in), a pressure hull length of 48.80 m (160 ft 1 in), a beam of 6.20 m (20 ft 4 in), a height of 9.50 m (31 ft 2 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 AEG GU 460/8-276 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).