This $400 million super-yacht was built for a Russian oligarch, Andrey Melnichenko, 37, who is worth $9.2 billion and was ranked 172 on the Forbes list of the world’s richest people.

There is a large master suite as well as six luxury cabins for up to 14 guests and enough room for 42 crew members.

Designed by Philippe Stark, the 400ft long superyacht is said to have its own discotheque featuring a glass roof which is situated directly under the swimming pool.

Other details of the interior have been kept strictly secret by its German boat builders Blohm and Voss.

But it is rumoured to have a helicopter hangar, as well as two 30ft speed boats kept in hatches on both sides of the hull.

Yacht “A” – named after his model wife Aleksandra – is registered in Bermuda, weighs 5,900 tons and can travel at speeds of up to 27 miles per hour.

The futuristic yacht docked in Kristiansand, Norway, last week where three paintings by the French Impressionist artist Claude Monet were loaded on board, amid an impressive security operation.

Mr Melnichenko was a founder of worldwide MDM Bank and went on to become its president from 1997 to 2001.