Thursday marks three years since Titan Submersible was reported missing

(CBS, KYMA) - On June 18, 2023, the Titan Submersible, which was owned and operated by OceanGate Expeditions, lost contact with the Polar Prince, a Canadian research vessel, about one hour and 45 minutes into its voyage in the North Atlantic.

After the Titan sub lost contact with the Polar Prince, a massive international search and rescue effort was launched over several days because of the limited amount of oxygen that would be aboard the sub if it had become trapped beneath the surface.

However, on June 22, 2023, the Coast Guard announced that the sub had experienced a "catastrophic loss of the pressure chamber," during its descent. It confirmed that the Titan's debris was located about 900 nautical miles east of Cape Cod, Massachusetts.

Those who died in the implosion were OceanGate CEO Stockton Rush, Pakistani businessman Shahzada Dawood, his 19-year-old son Suleman, billionaire adventurer Hamish Harding and French explorer Paul-Henri Nargeolet.

OceanGate suspended all operations in early July 2023. The company, which charged $250,000 per person for a voyage aboard the Titan, had been warned of potential safety problems for years.

In October, the Coast Guard announced it recovered "additional presumed human remains" and what is believed to be the last of the debris from the Titan.