An improved version of the Type VIIA, the VIIB had a slightly lengthened hull and larger saddle tanks. This enabled a bigger fuel capacity which increased the range from 4,300nm to 6,500nm. Superchargers were fitted t… See more

The Type VIIC retained the same characteristics of the VIIB except that it was equipped with new active sonar device. Additional space was needed for this device and to accommodate for this, the hull was fur… See more

The Type VIIC/41 was the German response to counter the effectiveness of British ASW progress made in 1940/41. As British ASW weapons and equipment improved, depth charges were becoming more effecti… See more

The Type VIIC/42 was a planned further improvement of the VIIC/41. A contract was placed for 165 of this new boat, but none were ever laid, let alone completed. This design would have housed an additional supercharg… See more

The Type VIIC/43 was a planned similar design to the VIIC/42, but with upgraded firepower. It was to house six bow and four stern torpedo tubes. This design was cancelled in May 1943. See more