The update just provided by Rear Admiral John Mauger provides more information. Five persons were on board, the pilot and four mission specialists. No names were provided in derference to their familes. They lost communication with the module 1 hour and 45 minutes into its descent. Currently, there are two American C-130’s and a Canadian Poseidon aircraft with underwater detection. An additional US C-130 will launch shortly. There are also numerous vessels, military and private involved in the search. They are searching the surface in the event it surfaced as well as sonar with the capability to reach that depth and detect communication and sound,

The vessel barring a tremendous water breech, is equipped with 96 hours of oxygen (roughly four days). Estimates indicate they are approaching 70 hours. The immediate focus is on locating it. Once they know where it is, they will focus on how to retrieve it. Surface would be easier and allow more oxygen. There are assets around the world that can reach that depth, question becomes how fast they can arrive on scene.

Race is on. More updates as soon as they become available.

iStockAn OceanGate Expeditions submarine is missing on an expedition to the remains of the Titanic. OceanGate is based at the Port of Everett and is available for $250,000 a seat. That price tag includes extensive training and preparation. It can carry five passengers including crew. At this time, it is not officially known how many people were on board. A search is underway, and updates will be provided as information becomes available.

The Joint Rescue Coordination Centre in Halifax, Canada, said the vessel was reported overdue at 9.13pm on Sunday (12.13pm Monday AEST), about 700 kilometers south of St John’s, Newfoundland. Lieutenant Commander Len Hickey said a Canadian Coast Guard vessel and military aircraft were assisting the search effort, which was being led by the US Coast Guard in Boston.

Lt. Jordan Hart of the U.S. Coast Guard in Boston said personnel were “currently undergoing a search and rescue operation.”

“Our entire focus is on the crewmembers in the submersible and their families,” said OceanGate, adding that it was “deeply thankful for the extensive assistance we have received from several government agencies and deep-sea companies in our efforts to re-establish contact with the submersible.”

The U.S. Coast Guard said in a tweet that “A USCG C-130 crew is searching for an overdue Canadian research submarine approximately 900 miles off Cape Cod,” and that the Rescue Coordination Center Halifax is assisting with a P8 Poseidon aircraft, which has underwater detection capabilities.

Petty Officer Lourdes Putnam confirmed that Coast Guard officials were searching for the submersible, which is operated by OceanGate Expeditions. It was not clear how many people were on board, and Officer Putnam offered no further details. The company’s website said its submersibles carry five people.

These submersibles are used for scientific research and exploration, and commercial purposes, making the deep depths more accessible. The Titanic, which famously sank in 1912 and rests in 12,500 feet of water, making it inaccessible to SCUBA or other traditional forms of ocean exploration, due to its depth.