SM UB-86
 SM UB-86 stranded at Falmouth, 1921. | |
| Career (German Empire) |  |
|---|---|
| Name: | UB-86 |
| Ordered: | 23 September 1916[1] |
| Builder: | AG Weser, Bremen[2] |
| Cost: | 3,341,000 German Papiermark[2] |
| Yard number: | 286[2] |
| Launched: | 10 October 1917[3] |
| Commissioned: | 10 November 1917[3] |
| Fate: | surrendered 24 November 1918, broken up at Falmouth[3] |
| General characteristics | |
| Class and type: | German Type UB III submarine |
| Type: | Coastal submarine |
| Displacement: | 516 t (508 long tons; 569 short tons) surfaced 647 t (637 long tons; 713 short tons) submerged[2] |
| Length: | 55.85 m (183.2 ft) o/a[2] |
| Beam: | 5.8 m (19 ft)[2] |
| Draught: | 3.72 m (12.2 ft)[2] |
| Propulsion: | 2 shafts 6-cylinder Benz diesel engines,[4] 1,060 ihp (790 kW) Brown, Boveri & Cie[4] electric motors, 788 ihp (588 kW)[2] |
| Speed: | 13.4 knots (24.8 km/h; 15.4 mph) surfaced 7.5 knots (13.9 km/h; 8.6 mph) submerged[2] |
| Range: | 8,180 nmi (15,150 km; 9,410 mi) at 6 kn (11 km/h; 6.9 mph) surfaced 50 nmi (93 km; 58 mi) at 4 kn (7.4 km/h; 4.6 mph) submerged[2] |
| Test depth: | 50 m (160 ft)[4] |
| Complement: | 3 officers, 31 men[4] |
| Armament: | • 5 × 50 cm (19.7 in) torpedo tubes (4 bow, 1 stern) with 10 torpedoes • 1 × 8.8 cm (3.46 in) deck gun[4] |
| Service record | |
|---|---|
| Part of: |
V Flotilla 10 Feb 1918 - 5 May 1918 III Flotilla 5 May 1918 - 11 Nov 1918 |
| Commanders: |
Kptlt Hans Trenk[5] 10 Nov 1917 - 11 Nov 1918 |
| Operations: | 5 patrols |
| Victories: |
4 merchant ships sunk (5,876 GRT) 1 merchant ship damaged (1,735 GRT) 1 warship damaged (14,150 tons) |
SM UB-86 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 31 October 1917 as SM UB-86.[nb 1]
UB-86 was surrendered to the British on 24 November 1918 in accordance with the requirements of the Armistice with Germany. On her way to Falmouth, Cornwall, UB-86 and three other U-boats stranded and were broken up in Falmouth in 1921.[3]
Construction
UB-85 was ordered on 23 September 1916.
She was built by AG Weser of Bremen[2] and following just under a year of construction, launched at Bremen on 10 October 1917. UB-86 was commissioned later that same year under the command of Kptlt Hans Trenk.
Like all Type UB III submarines, UB-86 carried 10 torpedoes and was armed with a 8.8 cm (3.46 in) deck gun. UB-86 would carry a crew of up to 3 officer and 31 men and had a cruising range of 8,180 nautical miles (15,150 km).[2] UB-86 had a displacement of 516 t (508 long tons; 569 short tons) while surfaced and 647 t (637 long tons; 713 short 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.[2]
Service history
On 17 August 1918 UB-86 torpedoed the cargo steam ship Denebola 2 nautical miles (3.7 km) N by W from Gurnard Head near St Ives, Cornwall. Denebola, en route from Swansea bound for Rouen, was struck by two torpedoes which hit near number two and three holds causing her to sink rapidly.[6] The crew took to a boat and a raft and were later picked up by a patrol vessel.[6] The second engineer and one able seaman were lost.[6][7]
Summary of Raiding Career
| Date | Name | Nationality | Tonnage (GRT) |
Fate[8] |
|---|---|---|---|---|
| 21 February 1918 | Mercia |  Sweden |
1,127 | Sunk |
| 11 April 1918 | HMS King Alfred |  Royal Navy |
14,150 | Damaged |
| 18 April 1918 | Gregynog |  United Kingdom |
1,701 | Sunk |
| 17 August 1918 | Denebola | United Kingdom |
1,481 | Sunk |
| 17 August 1918 | Helene |  Denmark |
1,567 | Sunk |
| 19 August 1918 | Charity | United Kingdom |
1,735 | Damaged |
Notes
- Footnotes
- ↑ "SM" stands for "Seiner Majestät" (English: His Majesty's) and combined with the U for Unterseeboot would be translated as His Majesty's Submarine.
- Citations
- ↑ Rössler 1979, p. 55.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 2.10 2.11 2.12 Gröner 1985, p. 52.
- ↑ 3.0 3.1 3.2 3.3 Gröner 1985, p. 54.
- ↑ 4.0 4.1 4.2 4.3 4.4 Gröner 1985, p. 53.
- ↑ "Hans Trenk". Uboat.net. Retrieved 9 March 2015.
- ↑ 6.0 6.1 6.2 "SS Denebola [+1918]". Wreck Site. Retrieved 13 March 2014.
- ↑ British Merchant Shipping Losses WW1. HMSO.
- ↑ "SM UB-86 successes". UBoat.net. Retrieved 2 December 2014.
References
- 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.
- 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.
- 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.