[Beowulf9]

But how do you get to them and raise them up?

[libh8er]

“ But how do you get to them and raise them up?”

That comes later. The top priority is to attach an Oxygen line.

[Magnum44]

The DSRV’s maximum operating depth is approximately 1524 meters (5000 feet).

Titanic is at 12,500 ft depth. Robotics attaching a 12,500 ft winch cable or inflatable floatation bags is the only way they may be brought back up.

[metmom]

But how do you get to them and raise them up?

And can they be raised up fast enough to save their lives before their oxygen runs out without killing them with the bends?

[Mozzafiato]

But how do you get to them and raise them up?

Hack into the Playstation controller and maneuver them out of the abyss with an old fashioned joystick.

[Blood of Tyrants]

Take a bladder down and pump it full of diesel fuel. Air is not an option because at 12,500 feet, the air would have to be compressed to greater than 5,000 psi just to get it out of the hose into the bladder.