SM UB-73 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 2 October 1917 as SM UB-73.[Note 1]
 UB-148 at sea, a U-boat similar to UB-73.
| |
| History | |
|---|---|
 German Empire | |
| Name | UB-73 |
| Ordered | 23 September 1916[1] |
| Builder | AG Vulcan, Hamburg |
| Cost | 3,337,000 German Papiermark |
| Yard number | 97 |
| Launched | 11 August 1917[2] |
| Commissioned | 2 October 1917[2] |
| Fate | Surrendered to the French on 21 November 1918, broken up at Brest July 1921.[2] |
| General characteristics [2] | |
| Class and type | Type UB III submarine |
| Displacement | |
| Length | 55.52 m (182 ft 2 in) (o/a) |
| Beam | 5.76 m (18 ft 11 in) |
| Draught | 3.70 m (12 ft 2 in) |
| Propulsion |
|
| Speed |
|
| Range |
|
| Test depth | 50 m (160 ft) |
| Complement | 3 officers, 31 men[2] |
| Armament |
|
| Service record | |
| Part of: |
|
| Commanders: | |
| Operations: | 6 patrols |
| Victories: |
|
UB-73 was serving in the Mediterranean. On 21 November 1918 she was surrendered to France as required by the regulations of the Armistice with Germany.[2]
Construction
editUB-72 was ordered by the GIN on 23 September 1916.
She was built by AG Vulcan of Hamburg and following just under a year of construction, launched at Hamburg on 11 August 1917. UB-73 was commissioned later that same year . Like all Type UB III submarines, UB-73 carried 10 torpedoes and was armed with a 8.8 cm (3.46 in) deck gun. UB-73 would carry a crew of up to 3 officer and 31 men and had a cruising range of 8,420 nautical miles (15,590 km; 9,690 mi). UB-73 had a displacement of 508 t (500 long tons) while surfaced and 639 t (629 long tons) when submerged. Her engines enabled her to travel at 13.4 knots (24.8 km/h; 15.4 mph) when surfaced and 7.5 knots (13.9 km/h; 8.6 mph) when submerged.
Summary of raiding history
edit| Date | Name | Nationality | Tonnage[Note 2] | Fate[6] |
|---|---|---|---|---|
| 7 April 1918 | Catriena |  Netherlands
|
115 | Sunk |
| 11 April 1918 | Myrtle Branch |  United Kingdom
|
3,741 | Sunk |
| 14 April 1918 | Chelford | United Kingdom
|
2,995 | Sunk |
| 16 April 1918 | Ladoga | United Kingdom
|
1,917 | Sunk |
| 16 April 1918 | Lodaner | United Kingdom
|
3,291 | Sunk |
| 18 April 1918 | Dalegarth Force | United Kingdom
|
684 | Sunk |
| 23 June 1918 | Mountain Laurel |  Norway
|
705 | Sunk |
| 24 June 1918 | HMS D6 |  Royal Navy
|
495 | Sunk |
| 25 June 1918 | Orissa | United Kingdom
|
5,358 | Sunk |
References
editNotes
edit- ^ "SM" stands for "Seiner Majestät" (English: His Majesty's) and combined with the U for Unterseeboot would be translated as His Majesty's Submarine.
- ^ Merchant ship tonnages are in gross register tons. Military vessels are listed by tons displacement.
Citations
edit- ^ Rössler 1979, p. 61.
- ^ a b c d e f Gröner 1991, pp. 25–30.
- ^ Helgason, Guðmundur. "WWI U-boat commanders: Woldemar Adam". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 February 2015.
- ^ Helgason, Guðmundur. "WWI U-boat commanders: Karl Neureuther". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 February 2015.
- ^ Helgason, Guðmundur. "WWI U-boat commanders: Max Bräutigam". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 February 2015.
- ^ Helgason, Guðmundur. "Ships hit by UB 73". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 February 2015.
Bibliography
edit- 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. Vol. 2. Translated by Thomas, Keith; Magowan, Rachel. London: Conway Maritime Press. ISBN 0-85177-593-4.
- Rössler, Eberhard (1979). Die deutschen U-Boote und ihre Werften: eine Bilddokumentation über den deutschen U-Bootbau; in zwei Bänden (in German). Vol. I. Munich: Bernard & Graefe. ISBN 3-7637-5213-7.