The German squadron did not detect the submarine K-21's torpedo attack on 5 July 1942.
Notes on verification
Confirmed by multiple independent sources, including detailed historical accounts referencing German documents and Soviet records, consistent in describing the undetected torpedo attack.
Sources
- Attack on the battleship Tirpitz by submarine K-21 (en.wikipedia.org)
- https://warhistory.org/@msw/article/k-21-versus-bb-tirpitz (warhistory.org)
- https://www.kbismarck.com/tirpitz.html (kbismarck.com)
- https://en.topwar.ru/36127-ataka-na-tirpic-obstoyatelstva-podviga-k-21.html (en.topwar.ru)