Aerial image obtained from the US Coast Guard, the ship Deep Energy sails in the search area for OceanGate's Titan submersible. AFP / US Coast Guard
Titan submersible passengers (L-R, top to bottom): Hamish Harding, Stockton Rush, Paul-Henri Nargeolet, Suleman Dawood and his father Shahzada Dawood. AFP
A view shows the ROV (Remotely Operated underwater Vehicle) Victor 6000 in this undated photograph released by Ifremer. Olivier Dugornay - Ifremer - CCBY/Handout via REUTERS
A view shows the control room for the ROV (Remotely Operated underwater Vehicle) Victor 6000 observation mission during the ESSROV18 campaign in this undated photograph released by Ifremer. Stephane Lesbats – Ifremer/Handout via REUTERS
A view shows the ROV (Remotely Operated underwater Vehicle) Victor 6000 in this undated photograph released by Ifremer. Stephane Lesbats - Ifremer - CCBY/Handout via REUTERS
The Titan submersible, operated by OceanGate Expeditions to explore the wreckage of the sunken SS Titanic off the coast of Newfoundland, dives in an undated photograph. File picture. OceanGate Expeditions/Handout via REUTERS
Crews work on Coast Guard vessels at Coast Guard Base Boston in Boston, Massachusetts. Joseph Prezioso / AFP