Oruç Reis-class submarine
The Oruç Reis-class submarines were ordered by the Turkish Navy from the British company Vickers in 1939. They were similar to the British S-class submarines, but slightly smaller. They had the S-class machinery but only four bow torpedo tubes. The four boats were requisitioned by the Royal Navy on the outbreak of World War II and fought in the British fleet as the P611 class. Two submarines were delivered to the Turks in 1942 in order to bolster Turkish strength against the threat from Nazi Germany and the remaining surviving submarine was delivered to the Turkish Navy after the end of the war in 1945. P615 had been sunk in 1943. The three Turkish boats were scrapped in 1957.
P614 and P615 appear in the film We Dive at Dawn as HMS Sea Tiger.
Ships
All were built by Vickers in Barrow-in-Furness.| Turkish name | Namesake | Royal Navy number | Laid Down | Launched | Commissioned | Fate |
| Burak Reis | Burak Reis | 24 May 1939 | 19 October 1940 | 10 March 1942 17 January 1946 | Returned to Turkey 1945, Scrapped 1957 | |
| Murat Reis | Murat Reis | 24 May 1939 | 20 July 1940 | 7 January 1942 16 May 1942 | Returned to Turkey May 1942, Scrapped 1957 | |
| Oruç Reis | Oruç Reis | 24 May 1939 | 19 July 1940 | 1 December 1941 9 May 1942 | Returned to Turkey May 1942, Scrapped 1957 | |
| Uluç Ali Reis | Uluç Ali Reis | 30 October 1939 | 1 November 1940 | 3 April 1942 | Sunk by U-boat 18 April 1943 near Sierra Leone |