German submarine U-978 was a World War II German Type VIIC U-boat operated by the Kriegsmarine. She holds the distiniction of having completed the longest underwater patrol of World War II.
| Identifier (URI) | Rank |
|---|---|
| dbkwik:resource/XRDonjdGL6dftbqJbjiq8g== | 5.88129e-14 |
| dbr:German_submarine_U-978 | 5.88129e-14 |
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