I guess mistakes are more common than we would like them to be
https://abcnews.go.com/amp/Politics/navy-warships-narrowly-a...
https://amp.cnn.com/cnn/2017/11/01/politics/navy-fitzgerald-...
Reads like clickbait. The thing you want to read is below the unrelated Youtube video talking about Russia's military strength. :-|
it got better
Unfair to single them out. Submarines sink regularly, often due to human error. Grounding, collisions, even arson. Periscope hatches left open, oxygen ports closed.
Ever drive off and leave your trunk lid open? Forget a kid at the mall? Not call your Mom on Mothers' Day? Then you understand how easy it is for human error to occur.