Coast Guard investigators say the event was "a preventable tragedy," with OceanGate's failure to follow safety and testing protocols being the main reason the sub imploded.

Multiple contributing factors — including OceanGate’s toxic workplace environment and profit-over-safety ethos — led to the entirely "preventable" implosion of a submersible that killed five people off Newfoundland two years ago, Coast Guard investigators said Tuesday.

PORTLAND, Maine — The Titan submersible disaster could have been prevented, the U.S. Coast Guard said in a report Tuesday that held OceanGate CEO Stockton Rush responsible for ignoring safety warnings, design flaws and crucial oversight which, had he survived, may have resulted in criminal charges.