Definition SM U-27 refers to a German Imperial Navy submarine (U-boat) commissioned during the early 20th century, specifically in the period leading up to or during World War I.
Overview SM U-27 was a Type U 27 submarine built for the Kaiserliche Marine (Imperial German Navy). It was launched in 1913 and entered active service in 1914, participating in naval operations during the First World War. U-boats like SM U-27 played a significant role in Germany’s naval warfare strategy, particularly in commerce raiding and submarine warfare in the Atlantic and adjacent waters.
The vessel conducted multiple war patrols and was credited with sinking several Allied merchant ships. SM U-27 was ultimately sunk on 19 August 1915 in the Western Approaches by the British Q-ship HMS Baralong in a controversial incident. The circumstances surrounding its sinking included claims of a false flag operation, as HMS Baralong allegedly flew the American flag before opening fire, leading to diplomatic discussions after the war.
Etymology/Origin The designation "SM U-27" follows the Imperial German Navy’s naming convention for submarines:
- "SM" stands for "Seiner Majestät" ("His Majesty’s"), denoting ownership by the German Emperor.
- "U" stands for "Unterseeboot," meaning "underwater boat" or submarine.
- "27" is the sequential hull number assigned to the vessel within its class.
Characteristics Key technical and operational characteristics of SM U-27 include:
- Class: Type U 27
- Builders: Germaniawerft, Kiel
- Launched: 24 July 1913
- Commissioned: 8 March 1914
- Displacement: Approximately 685 tonnes surfaced, 865 tonnes submerged
- Length: 64.70 meters
- Beam: 6.32 meters
- Draft: 3.56 meters
- Propulsion: Diesel engines (surface), electric motors (submerged)
- Speed: 16.4 knots surfaced, 9.7 knots submerged
- Range: Around 8,790 nautical miles at 8 knots surfaced
- Armament:
- 4 × 50 cm torpedo tubes (2 bow, 2 stern), with 6 torpedoes
- 1 × 8.8 cm SK L/30 deck gun
- Crew: Approximately 4 officers and 31 enlisted men
Related Topics
- German Imperial Navy (Kaiserliche Marine)
- Type U 27 submarine class
- World War I naval warfare
- U-boat campaigns
- Q-ships (disguised armed merchant vessels)
- HMS Baralong incident
- Submarine warfare tactics
- Neutral rights and naval blockades in international law