SM UC-78

SM UC-78 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 8 December 1916. She was commissioned into the German Imperial Navy on 10 January 1917 as SM UC-78.[Note 1] In twelve patrols UC-78 was credited with sinking 1 warship, either by torpedo or by mines laid. UC-78 was rammed and sunk by the British steamer Queen Alexandra west of Cherbourg on 9 May 1918.[1]

For other ships with the same name, see German submarine U-78.

History
German Empire
NameUC-78
Ordered12 January 1916[1]
BuilderAG Vulcan, Hamburg[2]
Yard number83[1]
Launched8 December 1916[1]
Commissioned10 January 1917[1]
FateRammed and sunk by Queen Alexandra, 9 May 1918[1]
General characteristics [3]
Class and typeGerman Type UC II submarine
Displacement
  • 410 t (400 long tons), surfaced
  • 493 t (485 long tons), submerged
Length
Beam
  • 5.22 m (17 ft 2 in) o/a
  • 3.65 m (12 ft) pressure hull
Draught3.65 m (12 ft)
Propulsion
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 depth50 m (160 ft)
Complement26
Armament
Notes30-second diving time
Service record
Part of:
  • Baltic Flotilla
  • 10 January 1917 – 18 January 1918
  • Flandern I Flotilla
  • 18 January – 9 May 1918
Commanders:
  • Oblt.z.S. / Kptlt. Hans Kukat[4]
  • 10 January 1917 – 15 January 1918
  • Oblt.z.S. Werner Löwe[5]
  • 16 – 18 January 1918
  • Kptlt. Hans Kukat[4]
  • 19 January – 9 May 1918
Operations: 12 patrols
Victories:
  • 1 warship sunk
    (350 tons)
  • 1 merchant ship damaged
    (1,481 GRT)

Design

A German Type UC II submarine, UC-78 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).[3]

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-78 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 cm (3.5 in) Uk L/30 deck gun. Her complement was twenty-six crew members.[3]

Summary of raiding history
Date Name Nationality Tonnage[Note 2] Fate[6]
12 August 1917 Lieutenant Burakov  Imperial Russian Navy 350 Sunk
4 April 1918 Eustratios  Greece 1,481 Damaged

References

Notes
  1. "SM" stands for "Seiner Majestät" (English: His Majesty's) and combined with the U for Unterseeboot would be translated as His Majesty's Submarine.
  2. Merchant ship tonnages are in gross register tons. Military vessels are listed by tons displacement.

Citations
  1. Helgason, Guðmundur. "WWI U-boats: UC 78". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 23 February 2009.
  2. Tarrant, p. 173.
  3. Gröner 1991, pp. 31–32.
  4. Helgason, Guðmundur. "WWI U-boat commanders: Hans Kukat". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 March 2015.
  5. Helgason, Guðmundur. "WWI U-boat commanders: Werner Löwe". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 March 2015.
  6. Helgason, Guðmundur. "Ships hit by UC 78". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 2 March 2015.

Bibliography
  • Bendert, Harald (2001). Die UC-Boote der Kaiserlichen Marine 1914-1918. Minenkrieg mit U-Booten (in German). Hamburg, Berlin, Bonn: Mittler. ISBN 3-8132-0758-7.
  • Gröner, Erich; Jung, Dieter; Maass, Martin (1991). U-boats and Mine Warfare Vessels. German Warships 1815–1945. Vol. 2. Translated by Thomas, Keith; Magowan, Rachel. London: Conway Maritime Press. ISBN 0-85177-593-4.
  • Gardiner, Robert; Gray, Randal, eds. (1985). Conway's All the World's Fighting Ships 1906–1921. Annapolis, Maryland: Naval Institute Press. ISBN 978-0-87021-907-8. OCLC 12119866.
  • Tarrant, V. E. (1989). The U-Boat Offensive: 1914–1945. Annapolis, Maryland: Naval Institute Press. ISBN 978-0-87021-764-7. OCLC 20338385.
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