Dead or on the lamb?

[guyfriday]

A little odd tid-bit about this yacht sinkage.
Bayesian superyacht maker says his boats are ‘unsinkable' as probe into tragedy continues (msn.com)

 The boss of the company behind the doomed Bayesian superyacht has described the vessel as "unsinkable".
Giovanni Costantino, who heads The Italian Sea Group, insisted that boats built by his firms are "safest in the most absolute sense".
Speaking to Sky News, Mr Costantino defended the yacht's design, saying there were no flaws or mistakes in the Bayesian, which capsized in a storm off the Sicilian coast and sank within minutes.

What other boating disaster happened on an "Unsinkable" ship, where a lot of economic elites went missing?