There the "Cat" found a German Type VIIC U-boat on the surface.

The Type IX U-boat was designed by Germany in 1935 and 1936 as a large ocean-going submarine for sustained operations far from the home support facilities.

Little information is available on the Type VIII U-boat, other than it was planned for production in the event of mobilization in 1935.

The Type XXII U-boat was intended for coastal and Mediterranean use.

There in late 1944 he wrote the battle instructions for the new Type XXIII U-boat.

She was one of two Type II U-boats built at the Flender Werke in Lübeck.

They were built as the Type VIIC/41 U-boat from 1940 to 1945.

U-864 was a Type IX U-boat, designed for long, ocean-going voyages with limited re-supply.

He lived, now, in a Type VIIA U-boat; crammed into the steel cylinder with forty-five other men.

The shelter was nearing completion and was to be a factory for the assembly of Type XXI U-boats.