[Johnny555]

>I'd hope he thought it had less than a 1% failure rate.

When failure means instant death that would be a pretty awful failure rate for a commercial product meant to take paying customers from the general public. And even if meant to take well informed researchers and engineers.

If failure meant "Oops, the ballast dropped prematurely, looks like we're going to have to cut this dive short", that's one thing, but when it means "You're going to be crushed by immense pressure in a millisecond", that's quite another.