This Luxury Superyacht For ''Visionary Billionaires'' Can Remain Under Water For 4 Weeks

It will be equipped to hold 20 passengers and 40 crew members, dive to a depth of 820 feet (250 metres), and stay submerged for four weeks.

A company in Austria is developing a huge, submersible luxury superyacht intended for ''visionary billionaires'', the New York Post reported. Migaloo has revealed its ambitious plans for what it claims will be the ''world's only private submersible superyacht,'' offering ''a not-yet-existing alternative to large privately owned surface vessels.''

This submarine, Migaloo M5, would measure 165.8 meters in length and 23 meters across at its widest point, with a range of around 15,000 kilometres and a speed of up to 20 knots when surfaced (or 12 knots when underwater). It will be equipped to hold 20 passengers and 40 crew members, dive to a depth of 820 feet (250 metres), and stay submerged for four weeks. 

Customisation for customers is also available. Migaloo says, ''The wished dimensions of the submarine-yacht hybrid, the exterior styling and the interior design are up to the owners' preferences.”