Missing Titanic submarine: Vessel plagued by concerns about possibly 'catastrophic' technical issues before it disappeared
The tourist submarine that went missing while surveying the wreck of the Titanic was the subject of concerns from experts and observers over its design and lack of certification by any kind of marine regulatory body.
New York United States David Pogue Chris Parry Drchrisparry Oceangate Inc Royal Navy Rear Admiral Chris Parry
Source: washingtonexaminer.com