U-boat
C27246
concept
A U-boat is a German military submarine, especially those used in the World Wars for stealthy naval warfare, commerce raiding, and blockades.
Observed surface forms (2)
| Surface form | Occurrences |
|---|---|
| German Type U 9 submarine | 1 |
| World War I U-boat | 1 |
Instances (7)
| Instance | Via concept surface |
|---|---|
| German submarine U-81 | — |
| U-20 | — |
|
U-9
surface form:
SM U-9
|
German Type U 9 submarine |
| German submarine U-75 | — |
| German submarine U-96 | — |
| German submarine U-557 | — |
| German submarine U-410 | — |