Convoy route OB
| Code | OB |
| Route | Liverpool - Outward (North America) |
| Area | North Atlantic |
| Notes | From September 1939 to July 1940 from Bristol Channel, then from North Channel. In July 1941 merged with ON(F) and ONS. |
| Convoys | Date | Losses |
| OB-17 | Oct 1939 | 1 ship sunk for a total of 5.202 tons |
| OB-25 | Oct 1939 | 1 ship sunk for a total of 5.317 tons |
| OB-46 | Dec 1939 | 1 ship sunk for a total of 8.795 tons |
| OB-48 | Dec 1939 | 2 ships sunk for a total of 14.065 tons |
| OB-72 | Jan 1940 | |
| OB-74 | Jan 1940 | 1 ship sunk for a total of 5.494 tons |
| OB-176 | Jul 1940 | 1 ship sunk for a total of 8.999 tons |
| OB-188 | Jul 1940 | 4 ships sunk for a total of 29.320 tons |
| OB-191 | Jul 1940 | 1 ship sunk for a total of 6.322 tons |
| OB-193 | Aug 1940 | 1 ship sunk for a total of 5.408 tons |
| OB-197 | Aug 1940 | 2 ships sunk for a total of 8.953 tons |
| OB-198 | Aug 1940 | 1 ship sunk for a total of 4.397 tons |
| OB-202 | Aug 1940 | 2 ships sunk for a total of 16.620 tons |
| OB-201 | Aug 1940 | 1 ship sunk for a total of 3.774 tons |
| OB-205 | Aug 1940 | 3 ships sunk for a total of 10.991 tons |
| OB-206 | Sep 1940 | 1 ship sunk for a total of 4.261 tons |
| OB-213 | Sep 1940 | 2 ships sunk for a total of 16.169 tons |
| OB-216 | Sep 1940 | 5 ships sunk for a total of 41.338 tons |
| OB-217 | Sep 1940 | 5 ships sunk for a total of 29.066 tons |
| OB-218 | Sep 1940 | 5 ships sunk for a total of 26.140 tons |
| OB-220 | Sep 1940 | 1 ship sunk for a total of 2.499 tons |
| OB-221 | Oct 1940 | 1 ship sunk for a total of 5.943 tons |
| OB-222 | Oct 1940 | 1 ship sunk for a total of 6.123 tons |
| OB-225 | Oct 1940 | 1 ship sunk for a total of 5.811 tons |
| OB-227 | Oct 1940 | 1 ship sunk for a total of 4.747 tons |
| OB-228 | Oct 1940 | 4 ships sunk for a total of 12.822 tons |
| OB-229 | Oct 1940 | 2 ships sunk for a total of 11.199 tons |
| OB-240 | Nov 1940 | 1 ship sunk for a total of 5.094 tons |
| OB-235 | Nov 1940 | 1 ship sunk for a total of 5.168 tons |
| OB-234 | Nov 1940 | 1 ship sunk for a total of 3.059 tons |
| OB-244 | Nov 1940 | 6 ships sunk for a total of 31.738 tons |
| OB-248 | Nov 1940 | 2 ships sunk for a total of 6.255 tons |
| OB-249 | Nov 1940 | 1 ship sunk for a total of 4.940 tons |
| OB-251 | Dec 1940 | 3 ships sunk for a total of 23.636 tons |
| OB-252 | Dec 1940 | 3 ships sunk for a total of 12.325 tons |
| OB-256 | Dec 1940 | 2 ships sunk for a total of 7.050 tons |
| OB-257 | Dec 1940 | |
| OB-259 | Dec 1940 | |
| OB-261 | Jan 1941 | 1 ship sunk for a total of 6.579 tons |
| OB-269 | Jan 1941 | 1 ship sunk for a total of 5.965 tons |
| OB-279 | Feb 1941 | 1 ship sunk for a total of 4.683 tons |
| OB-280 | Feb 1941 | 2 ships sunk for a total of 6.349 tons |
| OB-284 | Feb 1941 | 1 ship sunk for a total of 5.462 tons |
| OB-287 | Feb 1941 | 1 ship sunk for a total of 6.999 tons |
| OB-288 | Feb 1941 | 9 ships sunk for a total of 38.604 tons |
| OB-289 | Feb 1941 | 3 ships sunk for a total of 16.761 tons |
| OB-290 | Feb 1941 | 3 ships sunk for a total of 12.087 tons |
| OB-293 | Mar 1941 | 3 ships sunk for a total of 32.464 tons |
| OB-302 | Mar 1941 | 2 ships sunk for a total of 5.510 tons |
| OB-304 | Apr 1941 | 1 ship sunk for a total of 8.132 tons |
| OB-306 | Apr 1941 | 1 ship sunk for a total of 6.563 tons |
| OB-309 | Apr 1941 | 2 ships sunk for a total of 12.393 tons |
| OB-310 | May 1941 | 2 ships sunk for a total of 9.982 tons |
| OB-318 | May 1941 | 10 ships sunk for a total of 55.347 tons |
| OB-317 | May 1941 | 1 ship sunk for a total of 4.553 tons |
| OB-313 | May 1941 | 2 ships sunk for a total of 12.948 tons |
| OB-312 | May 1941 | 1 ship sunk for a total of 6.434 tons |
| OB-314 | May 1941 | 1 ship sunk for a total of 5.920 tons |
| OB-322 | May 1941 | 1 ship sunk for a total of 7.402 tons |
| OB-320 | May 1941 | 2 ships sunk for a total of 10.677 tons |
| OB-319 | Jun 1941 | 1 ship sunk for a total of 4.719 tons |
| OB-327 | Jun 1941 | 4 ships sunk for a total of 27.156 tons |
| OB-329 | Jun 1941 | 4 ships sunk for a total of 23.209 tons |
| OB-328 | Jun 1941 | 3 ships sunk for a total of 14.020 tons |
| OB-324 | Jun 1941 | 2 ships sunk for a total of 9.426 tons |
| OB-323 | Jun 1941 | 1 ship sunk for a total of 7.816 tons |
| OB-330 | Jun 1941 | 2 ships sunk for a total of 10.366 tons |
| OB-336 | Jun 1941 | 3 ships sunk for a total of 11.285 tons |
| OB-337 | Jul 1941 | 2 ships sunk for a total of 8.362 tons |
| OB-341 | Jul 1941 | 2 ships sunk for a total of 10.842 tons |
70 OB convoys successfully attacked in the war.
Resource id #100
ms = 00.49N20.15W,02.49N15.29W,04.24N13.46W,04.27N18.25W,06.40N27.50W,07.54N16.41W,08.16N16.50W,08.20N26.14W,08.30N14.39W,08.43N17.13W,08.50N15.30W,08N15W,09.13N15.09W,09.20N15.35W,09.50N17.50W,12.55N28.56W,12.58N27.20W,17.10N30.10W,22.24N21.11W,24.15N20.00W,25.33N28.23W,42.46N32.45W,42.59N31.40W,44.40N45.30W,45.18N36.40W,45N36.30W,46.17N36.20W,47.10N31W,47.24N16.49W,47.35N39.02W,48.02N25.06W,48.05N32.26W,48.25N26.12W,48.28N28.30W,48.30N28.30W,48.34N31.34W,48.40N15.30W,48.50N29W,49.20N09.45W,49.25N40.54W,49.30N12.15W,50.13N14.48W,50.28N08.28W,50.43N10.16W,51.34N17.35W,52.11N22.56W,53.02N42.10W,53.20N26.10W,53.26N18.33W,53.32N03.27W,53.32N24.35W,53.32N26.00W,53.34N20.23W,53.43N20.10W,53.49N24.19W,53N24W,53N21W,53N26W,53N17W,54.35N14.31W,54.37N21.30W,54.46N20.30W,54.50N10.40W,54.53N10.22W,54N18W,54N21W,55.10N17.16W,55.10N11W,55.10N25.02W,55.14N10.29W,55.14N10.34W,55.18N16.39W,55.23N38.49W,55.27N13.17W,55.29N18.01W,55.30N19.30W,55.30N15.30W,55.32N14.24W,55.39N07.18W,55.40N16.28W,55.41N14.20W,55.43N16.25W,55.44N08.04W,55.44N07.32W,55.45N14.29W,55.46N22.36W,55.47N09.18W,55.48N07.22W,55.50N14.20W,55.50N14W,55.50N07.30W,55.54N07.24W,55.55N08.20W,55N38W,56.04N09.52W,56.04N18.45W,56.04N18.30W,56.04N09.54W,56.12N23W,56.14N31.19W,56.15N09.10W,56.17N14.12W,56.20N10W,56.30N14.10W,56.37N17.53W,56.37N17.56W,56.38N10.24W,56.38N20.05W,56.43N21.15W,56.44N19.13W,56.46N21.15W,56.57N18.18W,57.10N16.37W,57.10N08.36W,57.16N17.02W,57.25N25W,57.30N17.14W,57.32N40.21W,57.54N37.34W,57.55N24.57W,57N20.30W,58.04N30.48W,58.12N21.29W,58.12N23.22W,58.13N21.33W,58.43N15W,58.50N21.47W,58N21W,58N25W,58N41W,59.05N17.47W,59.14N12.43W,59.18N21.30W,59.20N16.12W,59.23N35.25W,59.27N20.20W,59.28N35.44W,59.30N21W,59.30N21.00W,59.31N13.15W,60.18N29.28W,60.24N32.37W,60.28N13.38W,60.30N13.30W,60.31N13.52W,60.33N18.50W,60.40N15.50W,60.45N33.02W,60.46N16.30W,60N12.50W,60N29W,61.00N32.30W,61.01N12W,61.04N14.24W,61.09N12.04W,61.10N11.55W,61.29N22.40W,61N25W
Map showing ships hit from convoys on route OB. 158 ships with known position.
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