Searchers for Titanic Tourist Sub Heard ‘Banging’ From Area, Internal Comms Reveal
(www.rollingstone.com)
Assuming they’re on the bottom, they’d have to get a ship with about 4 km of cable to pull them up. (More probably. The titanic is at about 3.8km; as well as the ROVs
I’m not sure it has a hatch that can be used to transfer passengers onto a rescue sub. Kinda sounds like it doesn’t. (Assuming they even have a rescue sub in the area.)