re: Titanic tourist submarine goes missing

I'm guessing the landing skid wasn't designed to absorb an impact since he figured it would never come to that because of the "genius design".

I doubt the subs terminal velocity was very high if it did impact the bottom intact but it was pretty heavy even in water and the carbon fiber was already at it's limits at that depth so it probably wouldn't have taken much to cause the implosion.

The multiple failures needed for this scenario would be the worst case for the occupants. They would have known and it would have been agonizing for the father looking at his son.