Convoy route OA
| Code | OA |
| Route | Southend - Outward (N.-America) |
| Area | North Atlantic and UK coastal waters |
| Notes | Until July 1940 convoys from the Thames through the English Channel to Liverpool and dispersal in the North Atlantic. Later from Methil to Liverpool and dispersal in the North Atlantic, sometimes joining the OB convoy of the same number or continuing to Gibraltar when carrying the suffix G. |
| Convoys | Date | Losses | |
1939 | |||
| OA-17 | Oct 1939 | 1 ship sunk with a total of 6,903 tons. | |
1940 | |||
| OA-80G | Jan 1940 | 2 ships sunk with a total of 10,111 tons. | |
| OA-84 | Feb 1940 | 1 ship sunk with a total of 9,874 tons. | |
| OA-102 | Mar 1940 | 1 ship sunk with a total of 6,717 tons. | |
| OA-172 | Jun 1940 | 2 ships sunk with a total of 17,444 tons. | |
| OA-180 | Jul 1940 | 1 ship sunk with a total of 4,533 tons. | |
| OA-184 | Jul 1940 | 1 ship sunk with a total of 3,509 tons. | |
| OA-199 | Aug 1940 | 1 ship sunk with a total of 4,576 tons. | |
| OA-200 | Aug 1940 | 3 ships sunk with a total of 12,060 tons. | |
| OA-204 | Aug 1940 | 4 ships sunk with a total of 15,477 tons. | |
| OA-207 | Sep 1940 | 1 ship sunk with a total of 9,035 tons. | |
| OA-210 | Sep 1940 | 1 ship sunk with a total of 1,966 tons. | |
| OA-222 | Oct 1940 | 1 ship sunk with a total of 6,989 tons. | |
| OA-228 | Oct 1940 | 2 ships sunk with a total of 14,078 tons. | |
14 OA convoys successfully attacked in the war.
22 ships were sunk with a total of 123,272 GRT.
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