Submarine of the Redoutable class
| Navy | The French Navy |
| Type | Submarine |
| Class | Redoutable |
| Pennant | |
| Built by | Arsenal de Brest (Brest, France) |
| Ordered | |
| Laid down | 1 Sep, 1928 |
| Launched | 28 May, 1930 |
| Commissioned | 1 Feb, 1934 |
| Lost | 24 Sep, 1940 |
| Loss position | |
| |
| History | Sunk off Dakar on 24 September 1940 by the British destroyer HMS Fortune. Ajax had left harbor in an attempt to attack the Anglo-FNFL forces offshore, but was detected on sonar, depth charges, forced to the surface and finally sunk by gunfire shortly after 0700 hrs. |