SM UB-64 was a German Type UB III submarine or U-boat in the German Imperial Navy (de|Kaiserliche Marine) during World War I. She was commissioned into the German Imperial Navy on 5 August 1917 as SM UB-64.
UB-64 was surrendered to the British on 21 November 1918 in accordance with the requirements of the Armistice with Germany and broken up in Fareham in 1921.
See main article: Type UB III submarine. She was built by AG Vulcan of Hamburg and following just under a year of construction, launched at Hamburg on 9 June 1917. UB-64 was commissioned later that same year under the command of Kptlt. Otto von Schrader.
Like all Type UB III submarines, UB-64 carried 10 torpedoes and was armed with a 8.82NaN2 deck gun. UB-64 would carry a crew of up to 3 officer and 31 men and had a cruising range of 8420nmi. UB-64 had a displacement of 508lk=inNaNlk=in while surfaced and 639t when submerged. Her engines enabled her to travel at 13.3kn when surfaced and when submerged.
| Date | Name | Nationality | Tonnage[1] | Fate[2] | |
|---|---|---|---|---|---|
| 13 October 1917 | Newquay |  United Kingdom | 4,191 | Damaged | |
| 13 December 1917 | HMS Stephen Furness | 1,712 | Sunk | ||
| 14 February 1918 | Saga | United Kingdom | 1,143 | Sunk | |
| 19 February 1918 | Wilhelmina VII |  Netherlands | 109 | Sunk | |
| 30 March 1918 | Salaminia |  Greece | 3,112 | Sunk | |
| 5 April 1918 | Clam | United Kingdom | 3,552 | Damaged | |
| 11 April 1918 | Lakemoor |  United States | 2,045 | Sunk | |
| 23 May 1918 | Innisfallen | United Kingdom | 1,405 | Sunk | |
| 30 May 1918 | Cyprus | United Kingdom | 35 | Sunk | |
| 30 May 1918 | Glad Tidings | United Kingdom | 15 | Sunk | |
| 30 May 1918 | Honey Bee | United Kingdom | 34 | Sunk | |
| 30 May 1918 | Jane Gordon | United Kingdom | 27 | Sunk | |
| 30 May 1918 | Lloyd | United Kingdom | 35 | Sunk | |
| 30 May 1918 | Marianne Mc Crum | United Kingdom | 30 | Sunk | |
| 30 May 1918 | Never Can Tell | United Kingdom | 31 | Sunk | |
| 30 May 1918 | Seabird | United Kingdom | 15 | Sunk | |
| 30 May 1918 | Sparkling Wave | United Kingdom | 37 | Sunk | |
| 30 May 1918 | St. Mary | United Kingdom | 29 | Sunk | |
| 8 June 1918 | Elektra |  Norway | 614 | Sunk | |
| 9 June 1918 | Lena |  Sweden | 371 | Captured as prize | |
| 19 July 1918 | United Kingdom | 32,234 | Damaged | ||
| 19 July 1918 | Ranger | United Kingdom | 79 | Sunk | |
| 23 July 1918 | HMS Marmora | 10,509 | Sunk | ||
| 24 July 1918 | Defender | United Kingdom | 8,520 | Damaged | |
| 13 September 1918 | Buffalo | United Kingdom | 286 | Sunk | |
| 13 September 1918 | M. J. Craig | United Kingdom | 691 | Sunk | |
| 13 September 1918 | Setter | United Kingdom | 956 | Sunk | |
| 14 September 1918 | Neotsfield | United Kingdom | 3,821 | Sunk | |
| 15 September 1918 | Mary Fanny | United Kingdom | 94 | Sunk | |
| 15 September 1918 | Energy | United Kingdom | 89 | Sunk | |
| 15 September 1918 | Joseph Fisher | United Kingdom | 88 | Sunk | |
| 16 September 1918 | Serula | United Kingdom | 1,388 | Sunk | |
| 19 September 1918 | Barrister | United Kingdom | 4,952 | Sunk | |
| 21 September 1918 | Downshire | United Kingdom | 368 | Sunk |