Five people were killed as a result.

Thats about three times deeper than where Titanic wreck sits.

The 2014 filmDeepsea Challenge 3Ddocumented the accomplishment.

James Cameron CNN

James Cameron speaking to CNN’s Anderson Cooper on Thursday nightYouTube

Camerons subwas also experimental, but the director stressed that he did not take on passengers.

The dive was a chance he took on himself without allowing anyone else to share that risk.

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Chief among Camerons criticisms was OceanGates decision making around the hull of its submersible.

Josh Gates Titian submarine

That was not the case for Titan.

I think it was unconscionable that this group did not go through that rigorous process, he told CNN.

He stressed that there was nothingcontroversialabout that evaluation.

These were known things.

They were known to the engineering community.

The Oscar-winner says he now regrets he did not speak up about it.

I thought it was a horrible idea.

Sohnlein did indicate respect for Camerons knowledge and experience.

The deep ocean exploration community is a small community.

We generally all know each other and in general we respect each other.

To me thats cold comfort.

But I consider it a bad thing, because it sheds light on the fundamental flaw of their design.