The Soviet submarine K-21 fired four torpedoes at the Tirpitz from a considerable distance on 5 July 1942.
Notes on verification
Confirmed by multiple independent WWII naval history sources including uboat.net and kbismarck.com; consistent details on date, range, and outcome (all torpedoes missed).
Sources
- Attack on the battleship Tirpitz by submarine K-21 (en.wikipedia.org)
- https://uboat.net/allies/warships/ship/5126.html (uboat.net)
- https://www.kbismarck.com/tirpitz.html (kbismarck.com)
- https://www.octodaydispatch.com/column_posts/world_war_ii/germans-commission-kms-tirpitz/article_8dd6e070-7227-11eb-b83d-53c8c0957780.html (octodaydispatch.com)