“There absolutely are ways to make a trip down safer than sticking people in an improperly engineered carbon fiber tube “
The Titanic expert aboard had made 35 previous dives to the wreck starting in 1987.
He was an expert on surface naval construction and the Titanic. He was not a subject matter expert in submarine vehicle construction - and several such SMEs plus those who are in the carbon fiber fabrication industry have commented about the bad layup technique chosen.