As U.S. and Canadian crews continued to search Wednesday for a missing submersible that may have only a day’s supply of oxygen left, more information was emerging about experts’ attempts to warn the company that owns the underwater vessel about the perils of its operations.

RELATED: Search underway for missing submersible used to see Titanic wreckage https://youtu.be/GfYHa92bUt8

Documents show an OceanGate employee warned there might be catastrophic safety problems posed by the way the experimental vessel was developed, and leaders in the submersible craft industry told the company its approach to the enterprise could have a “catastrophic” outcome.

The 21-foot submersible was carrying five people in a dive to the wreckage site of the Titanic when it lost contact with a support ship late Sunday. Among those aboard are a British adventurer, two members of a Pakistani business family, a Titanic expert and the CEO of OceanGate, the company that owns the vessel.

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