I don't know how they could be retrieved successfully since the US Navy DSRV crush depth is only 5,000 feet; the only hope they have if they're still alive, is

I don't know how they could be retrieved successfully since the US Navy DSRV crush depth is only 5,000 feet; the only hope they have if they're still alive, is to get the propulsion back so they can maneuver to a more shallow depth. So sad.