Titanic sub visitor: We're aware of risks, it's not a lark

Mike Reiss, who travelled to see the Titanic on a submersible that has now gone missing, spoke to the BBC to describe his trip.

He said the vessel sunk like a stone and was propelled by small fans once it hit the bottom of the Atlantic Ocean.

Search teams are racing against time to find the missing tourist vessel, which has five people on board and vanished during a dive on Sunday.