These pages contain maps dealing with the U-boat war.
Simply click on the area you are interested in. The maps available are shown as boxes on this one.
Additional maps
The Kriegsmarine Grid system, Indian Ocean, U-869, Operation Deadlight, The Piening-Route.
Replica Kriegmarine map
Check out this nice replica of Kriegsmarine map 3401 - North Atlantic - that you can purchase directly from its creator.