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Career (Germany) War Ensign of Germany
Name: SM UC-42
Ordered: 20 November 1915[1]
Builder: AG Vulcan, Hamburg[2]
Yard number: 75[1]
Launched: 21 September 1916[1]
Commissioned: 18 November 1916[1]
Fate: sunk by own mine, 10 September 1917[1]
Service record
Part of: Kaiserliche Marine
Commanders: Otto Heinrich Tornow
Hans Albrecht Müller
Operations: 6 patrols
Victories: 13 ships sunk for a total of 9,636 tons
General characteristics
Class and type: Type UC II submarine
Displacement: 400 metric tons (440 short tons), surfaced[2]
480 metric tons (530 short tons), submerged
Length: 162 ft 3 in (49.45 m)[2]
Beam: 17 ft 4 in (5.28 m)[2]
Draft: 12 ft 2 in (4 m)[3]
Propulsion: 2 × propeller shafts
2 × 6-cylinder, 4-stroke diesel engines, 500 bhp (370 kW)[3]
2 × electric motors, 460 shp (340 kW)[3]
Speed: 11.7 knots (21.7 km/h), surfaced[2]
6.7 knots (12.4 km/h), submerged
Endurance: 9,410 nautical miles @ 7 knots, surfaced[3]
(17,430 km @ 13 km/h)
60 nautical miles @ 4 knots, submerged[3]
(110 km @ 7.4 km/h)
Test depth: 50 meters (160 ft)[3]
Complement: 26[3]
Armament: 6 × 100 cm (39.4 in) mine tubes[3]
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) KL/30 deck gun[2]
Notes: 48-second diving time[2]

SM UC-42 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 20 November 1915 and was launched on 21 September 1916. She was commissioned into the German Imperial Navy on 18 November 1916 as SM UC-42.[Note 1] In a career that encompassed six patrols, operating from 1 January 1917, UC-42 succeeded in sinking thirteen vessels totaling 9,636 tons, and disabling a warship of 1,210 tons displacement.

UC-42 was lost on 10 September 1917 after one of her own mines exploded, blowing off her stern and killing all 27 crew. The U-boat's loss was not known by the British until 31 October when oil was seen. Divers reached UC-42, recovering items and papers and bringing them to Dunmore East, in Waterford, Ireland. [4] The hatches were open, suggesting that the crew tried to escape; one body was recovered. Walter Richter was initially buried at Drumcannon, Waterford, but now lies in Glencree German war cemetery.[5]



  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.


  1. ^ a b c d e Helgason, Guðmundur. "WWI U-boats: UC-42". U-Boat War in World War I. Retrieved 23 February 2009.  
  2. ^ a b c d e f g Tarrant, p. 173.
  3. ^ a b c d e f g h Gardiner, p. 182.
  4. ^ Stokes, Roy (2004). U-Boat Alley: The U-Boat War in the Irish Channel During World War 1. ISBN 978-0954918606.  
  5. ^ D'Arcy, Fergus (2007). Remembering the war dead. ISBN 07557 7589 9.  


External links

Coordinates: 51°44′N 08°12′W / 51.733°N 8.2°W / 51.733; -8.2



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