Passengers of the Titanic submersible are required to sign a waiver acknowledging the potential risks of death associated with deep-sea diving, it has emerged.
A massive search and rescue operation is still under way in the mid Atlantic after the tourist submarine went missing during a dive to Titanic's wreck on Sunday.
According to the Coast Guard, the craft submerged Sunday morning, and its support vessel, the Canadian research icebreaker Polar Prince, lost contact with it about an hour and 45 minutes later.
