The families of the trapped Titanic tourists were clinging to hope last night that the detection of an underwater noise was their loved ones banging for help.
It came as the five men’s oxygen supply dwindled to perilously low levels leaving them with only a few hours of breathable air left by Thursday morning.
Despite the gravity of the situation, search and rescue crews have refused to give up mustering a Churchillian resolve in the harsh North Atlantic as the fleet of rescue vessels continues to swell.