The company's Titan sub submerged at 8am on Sunday morning around 400 miles southeast of St John's, Newfoundland. At 9.45am - an hour and 45 minutes into the dive - it lost contact.
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OceanGate Expeditions, the tourist company responsible for the missing submersible with five people on board, took eight hours to report it to the Coast Guard on Sunday, DailyMail.com can reveal.
The company's Titan sub submerged at 8am on Sunday morning around 400 miles southeast of St John's, Newfoundland. At 9.45am - an hour and 45 minutes into the dive - it lost contact with its mothership, the Polar Prince.
But it wasn't reported as missing to the US Coast Guard until 5.40pm, eight hours later.
Canada's Coast Guard wasn't alerted until even later - 9.13pm on Sunday night.