An undated photo shows tourist submersible belongs to OceanGate begins to descent at a sea.
But the crew had only a four-day oxygen supply when the vessel, called the Titan, set off around 6 a.m. Sunday.
The full area being searched was twice the size of Connecticut in waters as deep as 13,200 feet (4,020 meters).
"This is a search and rescue mission, 100%," he said Wednesday.
An undated photo shows tourist submersible belongs to OceanGate begins to descent at a sea.
Persons:
OceanGate, Captain Jamie Frederick, Donald Murphy, Frederick, Carl Hartsfield, Frank Owen, Owen, Arthur Loibl, Capt, Jamie Frederick, Scott Eisen, Rush, Jeff Karson, Karson
Organizations:
US Coast Guard, OceanGate, Anadolu Agency, Getty, First Coast Guard District, Coast, Patrol, Navy, Oceanographic Systems Laboratory, U.S . Navy, Stockton Rush, OceanGate Expeditions, U.S, U.S . Coast Guard, CBC, Syracuse University
Locations:
Boston, Canada, Connecticut, Atlantic, U.S, British, St, John's, Norfolk , Virginia, Germany, Cape Cod, Boston , Massachusetts