I actually remember when that happened. About half way down the outer glass cracked with a loud bang. Unbelievably they continued on down and finished the mission.
If I had been on that thing I guarantee you it would have gone back up immediately.
They would have had to bring it up if i was on it the smell coming from my pants would have made it toxic to be in that thing
I believe that there were two “portholes” on Trieste. They were made of very thick quartz crystal.
One of these cracked which is what made the BANG. The two scientists inside could not find any damage so they continued their mission. It was not until after they had surfaced that the damage was discovered.
Brave, brave men.
“If I had been on that thing I guarantee you it would have gone back up immediately.”
If it had been me there would have been one nasty smell in the sub.