SM UB-7

For other ships with the same name, see German submarine U-7.
History
German Empire
NameUB-7
Ordered15 October 1914[3][4]
BuilderGermaniawerft, Kiel[5]
Yard number245[2]
Laid down30 November 1914[2]
LaunchedApril 1915[1]
Commissioned6 May 1915[2]
FateDisappeared after 27 September 1916[2]
General characteristics [6]
Class and typeType UB I submarine
Displacement
  • 127 t (125 long tons) surfaced
  • 142 t (140 long tons) submerged
Length28.10 m (92 ft 2 in) (o/a)
Beam3.15 m (10 ft 4 in)
Draught3.03 m (9 ft 11 in)
Propulsion
Speed
  • 6.47 knots (11.98 km/h; 7.45 mph) surfaced
  • 5.51 knots (10.20 km/h; 6.34 mph) submerged
Range
  • 1,650 nmi (3,060 km; 1,900 mi) at 5 knots (9.3 km/h; 5.8 mph) surfaced
  • 45 nmi (83 km; 52 mi) at 4 knots (7.4 km/h; 4.6 mph)
Test depth50 metres (160 ft)
Complement14
Armament
Notes33-second diving time
Service record
Part of:
  • Pola Flotilla
  • 6 May – 21 June 1915[2]
  • Constantinople Flotilla
  • 21 June 1915 – 27 September 1916
Commanders:
  • Oblt.z.S. Wilhelm Werner[7]
  • 6 May 1915 – 11 April 1916[2]
  • Oblt.z.S. Hans Lütjohann[8]
  • 12 April – 27 September 1916
Operations: 15 patrols[2]
Victories: 4 merchant ships sunk
(6,283 GRT)[2]

SM UB-7[Note 1] was a German Type UB I submarine or U-boat in the German Imperial Navy (German: Kaiserliche Marine) during World War I. She disappeared in the Black Sea in September 1916.

UB-7 was ordered in October 1914 and was laid down at the AG Weser shipyard in Bremen in November. UB-7 was a little over 28 metres (92 ft) in length and displaced between 127 and 141 tonnes (125 and 139 long tons), depending on whether surfaced or submerged. She carried two torpedoes for her two bow torpedo tubes and was also armed with a deck-mounted machine gun. UB-7 was originally one of a pair of UB I boats sent to the Austro-Hungarian Navy to replace an Austrian pair to be sent to the Dardanelles, and was broken into sections and shipped by rail to Pola in March 1915 for reassembly. She was launched in April and commissioned as SM UB-7 in the German Imperial Navy in May when the Austrians opted out of the agreement.

Although briefly a part of the Pola Flotilla at commissioning, UB-7 spent the majority of her career patrolling the Black Sea as part of the Constantinople Flotilla. The U-boat sank one ship of 6,011 GRT in September 1915. In October, she helped repel a Russian bombardment of Bulgaria. She was considered for transfer to the Bulgarian Navy, but disappeared in late September 1916 before a transfer could take place. Her fate is officially unknown, but sources report that may have struck a mine or been sunk by a Russian airplane.

  1. ^ "UB-7 (6104978)". Miramar Ship Index. Retrieved 2 April 2009.
  2. ^ a b c d e f g h Helgason, Guðmundur. "WWI U-boats: UB 7". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 19 February 2009.
  3. ^ Cite error: The named reference Miller-46 was invoked but never defined (see the help page).
  4. ^ Williamson, p. 12.
  5. ^ Tarrant, p. 172.
  6. ^ Gröner 1991, pp. 22–23.
  7. ^ Helgason, Guðmundur. "WWI U-boat commanders: Wilhelm Werner (Pour le Mérite)". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 26 January 2015.
  8. ^ Helgason, Guðmundur. "WWI U-boat commanders: Hans Lütjohann". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 26 January 2015.


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