According to Wikipedia:
The Maltese Falcon built by Perini Navi in Tuzla, Turkey is a ship-rigged sailing luxury yacht, commissioned and formerly owned by American venture capitalist Tom Perkins. It is one of the largest privately owned sailing yachts in the world at 88 m (289 ft).
It was built after the dynaship concept, a 1960s invention of the German hydraulics engineer Wilhelm Prölss, which was intended to operate commercial freight sailing ships with as few crew as possible. The ship has fifteen square sails (five per mast), stored inside the mast; they can fully unfurl into tracks along the yards in six minutes.
The yacht is easily controlled and has been seen to sail off her anchor and away from berths within harbors. The yacht’s sophisticated computer detects parameters such as wind speed automatically and displays key data. An operator must always activate the controls, yet it is possible for a single person to pilot the yacht.