SM UB-69 was a German Type UB III submarine or U-boat in the German Imperial Navy (German: Kaiserliche Marine) during World War I. She was commissioned into the German Imperial Navy on 12 October 1917 as SM UB-69.
UB-148 at sea, a U-boat similar to UB-69.
|Ordered:||20 May 1916|
|Builder:||Friedrich Krupp Germaniawerft, Kiel|
|Cost:||3,276,000 German Papiermark|
|Launched:||7 August 1917|
|Commissioned:||12 October 1917|
|Fate:||sunk 9 January 1918 at 37°30′N 10°38′E by British warship|
|Class and type:||German Type UB III submarine|
|Length:||55.83 m (183 ft 2 in) (o/a)|
|Beam:||5.80 m (19 ft)|
|Draught:||3.67 m (12 ft 0 in)|
|Test depth:||50 m (160 ft)|
|Complement:||3 officers, 31 men|
UB-69 was serving in the Mediterranean when sunk at 37°30′N 10°38′E on 9 January 1918 by HMS Cyclamen. 31 crew members died in the event.
She was built by Friedrich Krupp Germaniawerft of Kiel and following just under a year of construction, launched at Kiel on 7 August 1917. UB-69 was commissioned later that same year under the command of Oblt.z.S. Alfred Klatt. Like all Type UB III submarines, UB-69 carried 10 torpedoes and was armed with a 8.8 cm (3.46 in) deck gun. UB-69 would carry a crew of up to 3 officer and 31 men and had a cruising range of 9,090 nautical miles (16,830 km; 10,460 mi). UB-69 had a displacement of 513 t (505 long tons) while surfaced and 647 t (637 long tons) when submerged. Her engines enabled her to travel at 13.2 knots (24.4 km/h; 15.2 mph) when surfaced and 7.6 knots (14.1 km/h; 8.7 mph) when submerged.
- "SM" stands for "Seiner Majestät" (English: His Majesty's) and combined with the U for Unterseeboot would be translated as His Majesty's Submarine.
- Bendert, Harald (2000). Die UB-Boote der Kaiserlichen Marine, 1914-1918. Einsätze, Erfolge, Schicksal (in German). Hamburg: Verlag E.S. Mittler & Sohn GmbH. ISBN 3-8132-0713-7.
- Gröner, Erich; Jung, Dieter; Maass, Martin (1991). U-boats and Mine Warfare Vessels. German Warships 1815–1945. 2. Translated by Thomas, Keith; Magowan, Rachel. London: Conway Maritime Press. ISBN 0-85177-593-4.
- Rössler, Eberhard (1979). U-Bootbau bis Ende des 1. Weltkrieges, Konstruktionen für das Ausland und die Jahre 1935 - 1945. Die deutschen U-Boote und ihre Werften (in German). I. Munich: Bernard & Graefe. ISBN 3-7637-5213-7.