# SM UB-37

SM UB-37 was a German Type UB II submarine or U-boat in the German Imperial Navy (German: Kaiserliche Marine) during World War I. The U-boat was ordered on 22 July 1915 and launched on 28 December 1915. She was commissioned into the German Imperial Navy on 17 June 1916 as SM UB-37.
The submarine sank 31 ships in ten patrols, and was itself sunk by British Q ship HMS Penshurst in the English Channel on 14 January 1917.
The wreck of UB-37 was identified by marine archaeologist Innes McCartney in 1999.

## Design

A Type UB II submarine, UB-37 had a displacement of 274 tonnes (270 long tons) when at the surface and 303 tonnes (298 long tons) while submerged. She had a total length of 36.90 m (121 ft 1 in), a beam of 4.37 m (14 ft 4 in), and a draught of 3.69 m (12 ft 1 in). The submarine was powered by two Benz six-cylinder diesel engines producing a total 270 metric horsepower (270 shp; 200 kW), two Siemens-Schuckert electric motors producing 280 metric horsepower (210 kW; 280 shp), and one propeller shaft. She was capable of operating at depths of up to 50 metres (160 ft).
The submarine had a maximum surface speed of 9.06 knots (16.78 km/h; 10.43 mph) and a maximum submerged speed of 5.71 knots (10.57 km/h; 6.57 mph). When submerged, she could operate for 45 nautical miles (83 km; 52 mi) at 4 knots (7.4 km/h; 4.6 mph); when surfaced, she could travel 7,030 nautical miles (13,020 km; 8,090 mi) at 5 knots (9.3 km/h; 5.8 mph). UB-37 was fitted with two 50 centimetres (20 in) torpedo tubes, four torpedoes, and one 8.8 cm (3.5 in) Uk L/30 deck gun. She had a complement of twenty-one crew members and two officers and a 42-second dive time.

## Summary of raiding history

| Date | Name | Nationality | Tonnage | Fate |
| 21 July 1916 | Samsø | Denmark | 388 | Damaged |
| 22 July 1916 | Bams | Norway | 308 | Sunk |
| 22 July 1916 | Ida | Sweden | 302 | Sunk |
| 22 July 1916 | Juno | Norway | 355 | Sunk |
| 22 July 1916 | Preference | Sweden | 222 | Sunk |
| 22 July 1916 | Subra | Norway | 580 | Sunk |
| 9 August 1916 | Danevang | Denmark | 1,247 | Sunk |
| 11 August 1916 | Rufus | Norway | 202 | Sunk |
| 13 August 1916 | Fremad | Norway | 104 | Sunk |
| 13 August 1916 | Pepita | Sweden | 261 | Sunk |
| 13 August 1916 | Respit | Norway | 473 | Sunk |
| 10 September 1916 | Zeemeeuv | Netherlands | 400 | Captured as prize |
| 23 September 1916 | Dresden | United Kingdom | 807 | Sunk |
| 23 September 1916 | Pearl | United Kingdom | 613 | Sunk |
| 24 September 1916 | Oceanien | France | 60 | Sunk |
| 25 September 1916 | Afrique | France | 1,743 | Sunk |
| 24 October 1916 | Twig | United Kingdom | 128 | Sunk |
| 13 November 1916 | Our Boys | United Kingdom | 63 | Sunk |
| 13 November 1916 | Superb | United Kingdom | 50 | Sunk |
| 28 November 1916 | Diligence | United Kingdom | 42 | Sunk |
| 28 November 1916 | Amphitrite | United Kingdom | 44 | Sunk |
| 28 November 1916 | Catena | United Kingdom | 36 | Sunk |
| 28 November 1916 | Provident | United Kingdom | 38 | Sunk |
| 28 November 1916 | Sea Lark | United Kingdom | 42 | Sunk |
| 28 November 1916 | Lynx | United Kingdom | 43 | Damaged |
| 30 November 1916 | Concord | United Kingdom | 51 | Sunk |
| 1 December 1916 | Erich Lindøe | Norway | 1,097 | Sunk |
| 4 December 1916 | Fofo | Greece | 2,615 | Sunk |
| 6 December 1916 | Halfdan | Denmark | 1,305 | Sunk |
| 7 December 1916 | Marguerite Dollfus | France | 1,948 | Sunk |
| 5 January 1917 | Asta | Norway | 573 | Sunk |
| 7 January 1917 | Hansi | Norway | 1,142 | Sunk |
| 10 January 1917 | Tuborg | Denmark | 2,056 | Sunk |
| 14 January 1917 | Norma | Denmark | 1,997 | Sunk |
| 14 January 1917 | HMS Penshurst | Royal Navy | 1,191 | Damaged |