And then there's the Crystal Ball, which, at 459" will be the largest yacht in the world when it's completed later this year: http://www.luxury-yachts.info/popup/popup_101.html "Blohm + Voss have signed a contract for a large Mega Yacht for delivery 2007. The order has been secured against international competition. The yacht will be constructed using the latest engineering and production technologies of the Hamburg yard, including virtual reality design and laser cutting and welding technology. Like with any yacht contract of Blohm + Voss, further details of the contract will be strictly confidential. The contract underlines the strengthened dedication of Blohm + Voss to Mega Yacht building." Notice how the helicopter on the second helipad can be protected from the elements... Is this the direction of yacht design? Does Paul Allen have a sub aboard?