Originally Posted by sarettah

typically an ssn (attack sub) runs at most around 300 meters deep, so that is about 975 feet.

the titanic is at around 3800 meters deep so about 12500.

there are very few submersibles capable of rescue that can get to that depth, so it is really useless to send a regular submarine down.

A DSRV (Deep Sea Rescue Vehicle) can only go to about 1500 meters and even if it could get down that deep it could not have helped these guys even if they had not imploded because reportedly the hatch is locked from the outside, it cannot be opened from the inside. I kept picturing these guys making it to the surface and then not being found so dying of suffocation on the surface because they could not open the hatch, a horrible picture.

I know this sounds morbid but as far as them dying, the implosion is pretty much the best possible way. They would not have had time to know what was happening and they would have died pretty much instantly (according to past submarine implosion reports)

.