SM U-27 (Germany)

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.

Other encounters

 * 31 October 1914, U-27 sank the seaplane carrier HMS Hermes (1898) in the Straits of Dover, in position 51.105°N, 1.83833°W.
 * 11 March 1915, U-27 sank the armed merchant cruiser HMS Bayano off Carswell Point, Stranraer at position 55.05°N, -5.43333°W.
 * 18 May 1915 – SS Drumcree ( undefined) was torpedoed and sunk by U-27 eleven miles NE of Trevose Head in Cornwall. She was in ballast from Barry to Port Arthur, Texas.
 * 19 May 1915 – SS Dumfries ( undefined) was torpedoed and sunk by U-27 13 miles north of Trevose Head. She was carrying coal from Cardiff to Livorno with the loss of two lives
 * 25 August 1916 (??), sank Duke of Albany 20 nmi off the Pentland Skerries.

Fate
On 19 August 1915, U-27 was sunk in the Western Approaches in position 50.71667°N, -7.36667°W by gunfire from Q-Ship HMS Baralong, and her entire crew including Bernhard Wegener was killed in the so-called Baralong Incident.