Editing U-boat (section)

===Classes===
* [[German Type I submarine|Type I]]: first design for a large 750-ton U-boat. Only 2 built as the design was not very successful.
* [[Type II submarine|Type II]]: small coastal submarines used mainly for training purposes. The latest subtype IID had saddle tanks which gave it a range to operate in the Atlantic, which it did until 1941
* [[German Type VII submarine|Type VII]]: the "workhorse" of the U-boats with 709 completed in World War II
* [[German Type IX submarine|Type IX]]: these long-range U-boats operated as far as the Indian Ocean with the Japanese ([[Monsun Gruppe]]), and the [[South Atlantic]]
* [[German Type X submarine|Type X]]: long-range minelayers but mainly used to resupply other U-boats
* [[German Type XIV submarine|Type XIV]]: unarmed U-boat, used to resupply other U-boats; nicknamed the {{lang|de|Milchkuh}} ("Milk Cow")
* Type XVII: small experimental coastal submarines powered by experimental hydrogen peroxide propulsion systems, not put into service
* [[German Type XXI submarine|Type XXI]]: known as the {{lang|de|Elektroboot}}. The design was taken into mass production, but only two set out for a war patrol before the end of the war
* [[German Type XXIII submarine|Type XXIII]]: smaller version of the XXI used for coastal operations. operated on a small scale during 1945
* [[Midget submarine]]s, including [[Biber (submarine)|''Biber'']], [[Hai (midget submarine)|''Hai'']], ''[[Molch]]'', and ''[[Seehund]]''
* [[Uncompleted U-boat projects]]