[Hamuko]

The details about the single window on the craft is also pretty damning:

>Further, the craft was designed to reach depths of 4,000 meters (13,123ft), where the Titanic rested. But, according to Lochridge, the passenger viewport was only certified for depths of up to 1,300 metres (4,265ft), and OceanGate would not pay for the manufacturer to build a viewport certified for 4,000 metres.

[N19PEDL2]

I read about the huge lack of safety measures on the submarine, and now this. I am beginning to think that perhaps the CEO of the company has voluntarily decided to die with his unfortunate fellow passengers. I know mine is big speculation, but taking the glass viewport to 300% of its certified maximum strength in an environment where the slightest setback can be fatal can no longer even be considered as "taking risks."

[nly]

Depends what certification entails. The company that certifies the ports might only have a sub that can go to 1300meters

Doesn't mean that the design isn't mathematically sound to far deeper.