The company behind the missing 'Titan' submersible was repeatedly warned about safety problems with the venture.

David Lochridge, OceanGate’s former director of marine operations wrote a critical report claiming passengers could be endangered if the vessel reached extreme depths.

According to court documents, Lochridge was sacked for raising these safety concerns.

UK correspondent Gavin Grey says these court documents raise questions about the safety of this craft and whether it should have been operated.

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