SM UC-75

History

German Empire
Name:	UC-75
Ordered:	12 January 1916
Builder:	AG Vulcan, Hamburg
Yard number:	80
Launched:	6 November 1916
Commissioned:	6 December 1916
Fate:	rammed and sunk by HMS Fairy, 31 May 1918
General characteristics
Class and type:	German Type UC II submarine
Displacement:	410 t (400 long tons), surfaced 493 t (485 long tons), submerged
Length:	50.45 m (165 ft 6 in) o/a 40.30 m (132 ft 3 in) pressure hull
Beam:	5.22 m (17 ft 2 in) o/a 3.65 m (12 ft) pressure hull
Draught:	3.65 m (12 ft)
Propulsion:	2 × propeller shafts 2 × 6-cylinder, 4-stroke diesel engines, 580–600 PS (430–440 kW; 570–590 shp) 2 × electric motors, 620 PS (460 kW; 610 shp)
Speed:	11.8 knots (21.9 km/h; 13.6 mph), surfaced 7.3 knots (13.5 km/h; 8.4 mph), submerged
Range:	8,660–10,230 nmi (16,040–18,950 km; 9,970–11,770 mi) at 7 knots (13 km/h; 8.1 mph) surfaced 52 nmi (96 km; 60 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth:	50 m (160 ft)
Complement:	26
Armament:	6 × 100 cm (39.4 in) mine tubes 18 × UC 200 mines 3 × 50 cm (19.7 in) torpedo tubes (2 bow/external; one stern) 7 × torpedoes 1 × 8.8 cm (3.46 in) Uk L/30 deck gun
Notes:	30-second diving time
Service record
Part of:	I Flotilla 10 February – 5 August 1917 Flandern/Flandern II Flotilla 5 August 1917 – 31 May 1918
Commanders:	Kptlt. Georg Paech 6 December 1916 – 16 March 1917 Oblt.z.S. Johannes Lohs 17 March 1917 – 30 January 1918 Oblt.z.S. Walter Schmitz 31 January – 31 May 1918
Operations:	13 patrol
Victories:	56 merchant ships sunk (82,864 GRT) 8 merchant ships damaged (40,021 GRT) 2 warships sunk (1,555 tons)

SM UC-75 was a German Type UC II minelaying submarine or U-boat in the German Imperial Navy (German: Kaiserliche Marine) during World War I. The U-boat was ordered on 12 January 1916 and was launched on 6 November 1916. She was commissioned into the German Imperial Navy on 6 December 1916 as SM UC-75. In 13 patrols UC-75 was credited with sinking 56 ships, either by torpedo or by mines laid. UC-75 rammed and sunk by HMS Fairy on 31 May 1918.

A German Type UC II submarine, UC-75 had a displacement of 410 tonnes (400 long tons) when at the surface and 493 tonnes (485 long tons) while submerged. She had a length overall of 50.45 m (165 ft 6 in), a beam of 5.22 m (17 ft 2 in), and a draught of 3.65 m (12 ft). The submarine was powered by two six-cylinder four-stroke diesel engines each producing 290–300 metric horsepower (210–220 kW; 290–300 shp) (a total of 580–600 metric horsepower (430–440 kW; 570–590 shp)), two electric motors producing 620 metric horsepower (460 kW; 610 shp), and two propeller shafts. She had a dive time of 30 seconds and was capable of operating at a depth of 50 metres (160 ft).

The submarine had a maximum surface speed of 11.8 knots (21.9 km/h; 13.6 mph) and a submerged speed of 7.3 knots (13.5 km/h; 8.4 mph). When submerged, she could operate for 52 nautical miles (96 km; 60 mi) at 4 knots (7.4 km/h; 4.6 mph); when surfaced, she could travel 8,660 to 10,230 nautical miles (16,040 to 18,950 km; 9,970 to 11,770 mi) at 7 knots (13 km/h; 8.1 mph). UC-75 was fitted with six 100 centimetres (39 in) mine tubes, eighteen UC 200 mines, three 50 centimetres (20 in) torpedo tubes (one on the stern and two on the bow), seven torpedoes, and one 8.8 centimetres (3.5 in) Uk L/30 deck gun. Her complement was twenty-six crew members.

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