Briefings about 96 hours of oxygen supply and banging noises were a "prolonged and nightmarish charade"
The search for a missing Titanic-bound submersible has become an investigation and salvage mission that will take an indefinite amount of time, officials said, as tributes from around the world poured in for the five people killed when the vessel imploded deep in the North Atlantic.
The announcement Thursday that all aboard perished when the submersible imploded near the site of the iconic shipwreck brought a tragic end to a five-day saga that included an urgent around-the-clock search and a worldwide vigil for the vessel known as the Titan.
The investigation into what happened was already underway and would continue in the area around Titanic where debris from the submersible was found, said Rear Adm. John Mauger, of the First Coast Guard District.
"I know there are also a lot of questions about how, why and when did this happen. Those are questions we will collect as much information as we can about now," Mauger said, adding that it was a "complex case" that happened in a remote part of the ocean and involved people from several different countries.
The first hint of a timeline came Thursday evening when a senior U.S. Navy official said that after the Titan was reported missing Sunday, the Navy went back and analyzed its acoustic data and found an "anomaly" that was consistent with an implosion or explosion in the general vicinity of where the vessel was operating when communications were lost. The official spoke on condition of anonymity to discuss a sensitive acoustic detection system.
Those killed were Stockton Rush, the CEO of OceanGate Expeditions, the company that owned and operated the submersible; two members of a prominent Pakistani family, Shahzada Dawood and his son Suleman Dawood; British adventurer Hamish Harding; and Titanic expert Paul-Henri Nargeolet.
OceanGate, which has been chronicling the Titanic's decay and the underwater ecosystem around it via yearly voyages since 2021 that included paying tourists, released a statement calling all five people killed "true explorers who shared a distinct spirit of adventure, and a deep passion for exploring and protecting the world's oceans."
Tributes to those killed and praise for the searchers who tried to save them poured in from across the globe. The White House thanked the Coast Guard, along with Canadian, British and French partners who helped in the search and rescue efforts.
"Our hearts go out to the families and loved ones of those who lost their lives on the Titan. They have been through a harrowing ordeal over the past few days, and we are keeping them in our thoughts and prayers," it said in a statement.
Pakistan's Foreign Ministry wrote on Twitter that it appreciates "the multinational efforts over the last several days in search of the vessel." The Dawood family also thanked all involved in the search.
"Their untiring efforts were a source of strength for us during this time," the family said in a statement. "We are also indebted to our friends, family, colleagues and well-wishers from all over the world who stood by us during our need."
Harding's family said in a statement: "He was one of a kind and we adored him... What he achieved in his lifetime was truly remarkable and if we can take any small consolation from this tragedy, it's that we lost him doing what he loved."
The Titan launched at 6 a.m. Sunday and was reported overdue Sunday afternoon about 435 miles (700 kilometers) south of St. John's, Newfoundland. Rescuers rushed ships, planes and other equipment to the site of the disappearance.
Authorities were hoping underwater sounds detected Tuesday and Wednesday might help narrow their search, whose coverage area had been expanded to thousands of miles - twice the size of Connecticut and in waters 2 1/2 miles (4 kilometers) deep.
Any sliver of hope that remained for finding the crew alive, however, was wiped away early Thursday, when the submersible's 96-hour supply of air was expected to run out and the Coast Guard announced that a debris field had been found roughly 1,600 feet (488 meters) from the Titanic.
"The debris is consistent with the catastrophic loss of the pressure chamber," Mauger said.
The Coast Guard said Thursday that the sounds heard in the previous days were likely generated by something other than the Titan.
"There doesn't appear to be any connection between the noises and the location (of the debris) on the seafloor," Mauger said.
The Navy official who spoke of the "anomaly" heard Sunday said the Navy passed on the information to the Coast Guard, which continued its search because the Navy did not consider the data to be definitive.
A longtime friend and colleague of Nargeolet told French media that when contact was lost Sunday, he quickly feared the worst.
"Unfortunately, I thought straight away of an implosion," diver and retired underwater filmographer Christian Pétron said Friday to broadcaster France-Info. At the depths in which the submersible was operating, the pressures are intense and unforgiving - equivalent to hundreds of kilograms weighing down on each square centimeter, he noted.
"Obviously, the slightest problem with the hull and its implosion is immediate," Pétron said.
He opined that Nargeolet was aware of the risks but would have been powered by a thirst for further exploration of the Titanic wreck and its fauna and flora.
Director James Cameron, who has made multiple dives to the wreckage of the Titanic, told the BBC that he knew an "extreme catastrophic event" had happened as soon as he heard the submersible had lost navigation and communications at the same time.
"For me, there was no doubt," Cameron said. "There was no search. When they finally got an ROV (remotely operated vehicle) down there that could make the depth, they found it within hours. Probably within minutes."
He said briefings about 96 hours of oxygen supply and banging noises were a "prolonged and nightmarish charade" that gave the crew members' families false hope.
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