Life aboard a U-boat during WWII was horrible but thankfully short from all the dying.
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Correction: During the show Joe says he couldn't find reports of U-Boat crews killing themselves. Someone pointed out it happened at least once in this incident:
https://en.wikipedia.org/wiki/Peter_Zschech
Sources:
Iron Coffins by Herbert Warner
https://www.warhistoryonline.com/instant-articles/horrors-of-serving-a-u-boat.html
https://warisboring.com/the-high-tech-toilet-that-destroyed-a-submarine/
