SM U-27 (Germany)

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For other ships of the same name, see German submarine U-27.
German UBoat U27 Sunk 19 August 1915 with crew.jpg
German UBoat U27 with crew
Career (German Empire)
Name: U-27
Ordered: 19 February 1912
Builder: Kaiserliche Werft Danzig
Launched: 14 July 1913
Commissioned: 8 May 1914
Fate: Sunk 19 August 1915 in Western Approaches. 37 dead.
General characteristics
Class and type: German Type U 27 submarine
Displacement: 685 tons surfaced
878 tons submerged[1]
Length: 64.70 m (212.3 ft)[2]
Beam: 6.32 m (20.7 ft)[2]
Draught: 3.48 m (11.4 ft)[2]
Speed: 16.4 knots (30.4 km/h; 18.9 mph) (surfaced)
9.8 knots (18.1 km/h; 11.3 mph) (submerged)
Range: 9,770 nautical miles (18,090 km; 11,240 mi) at 8 knots (15 km/h; 9.2 mph) (surfaced)
85 nautical miles (157 km; 98 mi) at 5 knots (9.3 km/h; 5.8 mph) (submerged)
Test depth: 50 m (164.0 ft)
  • 4 x 50 cm (19.7 in) torpedo tubes
  • 1 x 88 mm (3.46 in) deck gun
Service record
Part of: Imperial German Navy:
IV Flottilla
1 August 1914 – 19 August 1915
Commanders: Kptlt. Bernhard Wegener
8 May 1914 - 19 August 1915
Operations: 3 patrols
Victories: 10 merchant ships sunk (31,120 GRT)
2 warships sunk (6,325 tons)

SM U-27 was a German Type U-27 U-boat built for service in the Imperial German Navy. She was launched on 14 July 1913, and commissioned on 8 May 1914 with Kapitänleutnant Bernhard Wegener in command.

On 18 October 1914, the British submarine HMS E3 was torpedoed and sunk in the North Sea by U-27. This was the first action in which one submarine sank another.

Sinking of HMS E-3[edit]

HMS E3 had sailed from Harwich on 16 October to patrol off Borkum in the North Sea. On 18 October, E3 spotted some German destroyers ahead but was unable to get into a position to take a shot at them. Unable to pass them, Commander Cholmley retreated into the bay to wait for them to disperse. As he did so, he failed to see that the bay was also occupied by U-27, under Kapitänleutnant Bernd Wegener.

Wegener was surfaced and patrolling between the Ems and Borkum when at 11:25, an object resembling a buoy was spotted where no buoy should be. Suspecting a British submarine, U-27 immediately dived and closed the object. Although ‘conned down’, the number 83 was clearly visible on the conning tower of the British boat, now identified as such beyond reasonable doubt. Wegener tracked the submarine for two hours until able to approach ‘up sun’. He noted that the look-outs were staring intently in the other direction, towards the Ems. When the distance had closed to 656 yd (600 m), two G6 torpedoes were fired by U-27. Detonation followed 12 seconds later, and E3 sank immediately. The KTB records that men (probably the look-outs from the bridge) were visible in the water but fearing a second British submarine might have been lurking nearby, U-27 dived and withdrew. 30 minutes later, the U-boat returned to the scene to search for evidence and possible survivors but without success. All 28 members of E3‍ '​s crew were lost.

Other encounters[edit]


On 19 August 1915, U-27 was sunk in the Western Approaches in position 50°43′N 07°22′W / 50.717°N 7.367°W / 50.717; -7.367Coordinates: 50°43′N 07°22′W / 50.717°N 7.367°W / 50.717; -7.367 by gunfire from Q-Ship HMS Baralong, and her entire crew including Bernhard Wegener was killed in the so-called Baralong Incident.

Summary of raiding career[edit]

Date Name Nationality Tonnage
18 October 1914 HMS E3  Royal Navy 725 Sunk
31 October 1914 HMS Hermes  Royal Navy 5,600 Sunk
11 March 1915 HMS Bayano  Royal Navy 5,948 Sunk
13 March 1915 Hartdale  United Kingdom 3,839 Sunk
18 May 1915 Drumcree  United Kingdom 4,052 Sunk
19 May 1915 Dumfries  United Kingdom 4,121 Sunk
21 May 1915 Glenholm  United Kingdom 1,968 Sunk
18 August 1915 Ben Vrackie  United Kingdom 3,908 Sunk
18 August 1915 Gladiator  United Kingdom 3,359 Sunk
18 August 1915 Magda  Norway 1,063 Sunk
18 August 1915 Sverresborg  Norway 1,144 Sunk
19 August 1915 Pena Castillo  Spain 1,718 Sunk


  1. ^ U 27 type
  2. ^ a b c
  3. ^ HMS Hermes at
  4. ^ "Record for HMS Bayano". Royal Commission on the Ancient and Historical Monuments of Scotland. 19 June 2007. Retrieved 2009-06-15. 
  5. ^ Lettens, Jan. "SS Drumcree [+1915]". wrecksite. Retrieved 10 April 2012. 
  6. ^ Lettens, Jan. "SS Dumfries [+1915]". wrecksite. Retrieved 10 April 2012. 
  7. ^ Helgason, Guðmundur. "Ships hit by U-27". German and Austrian U-Boats of World War I - Kaiserliche Marine - Retrieved 22 December 2014. 


  • Gröner, Erich (1985). U-Boote, Hilfskreuzer, Minenschiffe, Netzleger, Sperrbrecher. Die deutschen Kriegsschiffe 1815–1945 (in German) III (Koblenz: Bernard & Graefe). ISBN 3-7637-4802-4.