| U-Tankers Available by Grid and Date | |||||||||||||||||||||||||||
| 1942 | 1943 | 1944 | |||||||||||||||||||||||||
| U-Boat | Grid | Area | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr |
| U-461 | CC61 | North-West Atlantic | 10th | 4th | |||||||||||||||||||||||
| U-463 | BD35 | North of Azores | 5th | 30th | |||||||||||||||||||||||
| U-460 | EH53 | Off Freetown | 5th | 4th | |||||||||||||||||||||||
| U-459 | GG89 | South of St. Helena, south Atlantic | 10th | 10th | |||||||||||||||||||||||
| U-461 | DF67 | South-West of Azores | 5th | 26th | |||||||||||||||||||||||
| U-488 | DF67 | South-West of Azores | 5th | 26th | |||||||||||||||||||||||