Price On Request MIGALOO PRIVATE SUBMERSIBLE YACHTS offer the world's first private submersible superyachts. The yachts take the concept of privacy to a whole other level, as they can remain submerged both at anchor and when cruising between destinations.Boasted by Migaloo as the world’s largest submersible superyacht, the 738-foot M7’s design is based on the United States Navy’s Zumwalt-class destroyer....