# SM UB-57

SM UB-57 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 Flanders Flotilla of the German Imperial Navy on 30 July 1917 as SM UB-57.
She operated as part of the Flanders Flotilla based in Zeebrugge. UB-57 was sunk at 23:00 on 14 August 1918 at 51°56′N 02°02′E﻿ / ﻿51.933°N 2.033°E﻿ / 51.933; 2.033 after striking a mine, 34 crew members lost their lives in the event.

## Construction

She was built by AG Weser, Bremen and following just under a year of construction, launched at Bremen on 21 June 1917. UB-57 was commissioned later that same year under the command of Kptlt. Otto Steinbrinck. Like all Type UB III submarines, UB-57 carried 10 torpedoes and was armed with a 8.8 cm (3.46 in) deck gun. UB-57 would carry a crew of up to 3 officer and 31 men and had a cruising range of 9,020 nautical miles (16,710 km; 10,380 mi). UB-57 had a displacement of 516 t (508 long tons) while surfaced and 646 t (636 long tons; 712 short tons) when submerged. Her engines enabled her to travel at 13.4 knots (24.8 km/h; 15.4 mph) when surfaced and 7.8 knots (14.4 km/h; 9.0 mph) when submerged.

## Summary of raiding history

| Date | Name | Nationality | Tonnage | Fate |
| 7 October 1917 | Alcyone | United Kingdom | 116 | Sunk |
| 11 October 1917 | Joshua | United Kingdom | 60 | Sunk |
| 20 October 1917 | Leander | Norway | 2,968 | Sunk |
| 20 October 1917 | Nitedal | Norway | 1,714 | Sunk |
| 22 October 1917 | Novillo | Denmark | 2,336 | Sunk |
| 23 October 1917 | Seistan | United Kingdom | 4,238 | Sunk |
| 23 October 1917 | Tredegar Hall | United Kingdom | 3,764 | Sunk |
| 22 November 1917 | Krosfond | Norway | 1,707 | Sunk |
| 24 November 1917 | Nyassa | United Kingdom | 2,579 | Sunk |
| 27 November 1917 | Almond Branch | United Kingdom | 3,461 | Sunk |
| 27 November 1917 | Eastfield | United Kingdom | 2,145 | Sunk |
| 22 December 1917 | Mabel Baird | United Kingdom | 2,500 | Sunk |
| 23 December 1917 | Vellore | Norway | 1,672 | Sunk |
| 26 December 1917 | Benito | United Kingdom | 4,712 | Sunk |
| 26 December 1917 | Tregenna | United Kingdom | 5,772 | Sunk |
| 28 December 1917 | Clara | United Kingdom | 2,425 | Sunk |
| 29 December 1917 | Tiro | Norway | 1,442 | Sunk |
| 5 February 1918 | Alamance | United States | 4,455 | Sunk |
| 6 February 1918 | Westmoreland | United Kingdom | 9,512 | Damaged |
| 7 February 1918 | Ardbeg | United Kingdom | 227 | Sunk |
| 7 February 1918 | Ben Rein | United Kingdom | 212 | Sunk |
| 7 February 1918 | Limesfield | United Kingdom | 427 | Sunk |
| 12 February 1918 | Eleanor | United Kingdom | 1,980 | Sunk |
| 12 February 1918 | Polo | United Kingdom | 1,383 | Sunk |
| 14 February 1918 | Carlisle Castle | United Kingdom | 4,325 | Sunk |
| 14 February 1918 | War Monarch | United Kingdom | 7,887 | Sunk |
| 17 March 1918 | Anne Yvonne | France | 102 | Sunk |
| 17 March 1918 | Arvor | France | 52 | Sunk |
| 17 March 1918 | Beata | France | 102 | Sunk |
| 19 March 1918 | Luxor | United Kingdom | 3,571 | Sunk |
| 23 March 1918 | Sequoya | United Kingdom | 5,263 | Damaged |
| 29 March 1918 | India | Portugal | 5,990 | Damaged |
| 29 March 1918 | T. R. Thompson | United Kingdom | 3,538 | Sunk |
| 31 March 1918 | Alcinous | United Kingdom | 6,743 | Damaged |
| 31 March 1918 | Excellence Pleske | United Kingdom | 2,059 | Sunk |
| 29 April 1918 | Australier | United Kingdom | 3,687 | Sunk |
| 29 April 1918 | Broderick | United Kingdom | 4,321 | Sunk |
| 29 April 1918 | La Somme | France | 1,477 | Sunk |
| 30 April 1918 | Ella Sayer | United Kingdom | 2,549 | Sunk |
| 30 April 1918 | Umba | United Kingdom | 2,042 | Sunk |
| 1 May 1918 | Canonesa | United Kingdom | 6,683 | Damaged |
| 2 May 1918 | Unity | United Kingdom | 1,091 | Sunk |
| 22 May 1918 | Red Rose | United Kingdom | 423 | Sunk |
| 23 May 1918 | HMS Moldavia | Royal Navy | 9,500 | Sunk |
| 26 May 1918 | Kyarra | United Kingdom | 6,953 | Sunk |
| 27 May 1918 | Joseph Simone | France | 8 | Sunk |
| 27 May 1918 | Petit Georges | France | 10 | Sunk |
| 27 May 1918 | Souvenir de Ste Marie | France | 7 | Sunk |
| 30 May 1918 | War Panther | United Kingdom | 5,260 | Damaged |
| 31 May 1918 | Galileo | United Kingdom | 6,287 | Damaged |
| 30 June 1918 | Wilton | United Kingdom | 4,281 | Damaged |
| 2 July 1918 | Royal Sceptre | United Kingdom | 3,858 | Damaged |
| 2 July 1918 | Shirala | United Kingdom | 5,306 | Sunk |
| 6 July 1918 | Huntscraft | United Kingdom | 5,113 | Damaged |
| 5 August 1918 | Tuscan Prince | United Kingdom | 5,275 | Damaged |
| 8 August 1918 | Clan Macvey | United Kingdom | 5,815 | Sunk |
| 9 August 1918 | Glenlee | United Kingdom | 4,915 | Sunk |