How fast did the people in it die?
Of course once the sub filled with water they would die instantly because it would reach insane pressures (300-400 ATM or 5800 PSI)
This is a good example, it's a hydrophone recording of a glass sphere imploding, the level of sound and echo should give you a good idea of the kind of forces we're dealing with:
https://www.youtube.com/watch?v=1_qlQhBa5V4
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This is a good example, it's a hydrophone recording of a glass sphere imploding, the level of sound and echo should give you a good idea of the kind of forces we're dealing with:
https://www.youtube.com/watch?v=1_qlQhBa5V4