THE US COASTGUARD has recovered remaining debris, including presumed human remains, from a submersible that imploded on its way to explore the wreck of the Titanic, killing all five on board.

Officials said the salvage mission conducted under an agreement with the US navy was a follow-up to initial recovery operations on the ocean floor roughly 1,600 feet (488 meters) away from the Titanic.

The coastguard said yesterday that the recovery and transfer of remaining parts was completed last Wednesday, and a photo showed the intact aft portion of the 22-foot (6.7-metre) vessel.

Investigators believe the Titan imploded as it made its descent into deep North Atlantic waters on 18 June.

The multi-day search mounted after Titan went silent captured attention around the world.

The deep-sea vessel was on an expedition to the Titanic wreckage when it lost contact with the tour operator an hour and 45 minutes into the two-hour descent.

The submersible was attempting to view the passenger liner that sank in 1912.

The coastguard previously said it recovered presumed human remains along with parts of the Titan after the debris field was located at a depth of 12,500 feet (3,800 metres).

The materials were offloaded at an unnamed port.

The coastguard’s Marine Board of Investigation is continuing its analysis and conducting witness interviews ahead of a public hearing on the tragedy.

OceanGate, the operator of the vessel, has since gone out of business.

Among those killed in the implosion was Stockton Rush, the submersible’s pilot and chief executive of the company.

British adventurer Hamish Harding, father and son Shahzada and Suleman Dawood, Frenchman Paul-Henri Nargeolet also died in the incident.