There were over 13 classes of U-Boats; see website: U-Boat
really big
german U-boats were submarines. in German they are called Unterseeboot
U boats
The numbers on German U-Boats represented the model numbers.
german submarines
U-boats were German.
U boats were invented in 1914 for WW1
No. German U-boats had ordinary, Arabic numerals, such U96 and so.
3-11 u-boats
German submarines were referred to as U-boats during the world wars.
U-boats, packs of German U-boats searching for American ships were called wolf packs
GeRmAnY!!!!!!!