Five key concerns regarding a manned submarine mission to view the Titanic wreckage may have been missed, as the hunt to find the crew continues.
The vessel went missing in the Atlantic Ocean with five people on board, with claims now that warning signs may have been ignored.
The OceanGate Expeditions vessel was headed to view the Titanic shipwreck on Sunday, but it lost contact around an hour and 45 minutes after it submerged.