What is a U-Boat?
A U-boat is a type of submarine invented by the Germans for use in World War I and II. The initial “U” in U-boat stands for “unterseeboot”, or undersea boat in English. Holland housed a “Submarine Development Bureau” in 1922 that was made to look like a regular shipbuilding company. The German U-boat designers had to secretly store special parts when they worked on improving their U-boats.