2m 28sLength

That's what you call an upgrade! Russian billionaire unveils his £260m superyacht which is 300ft high, has eight floors and an underwater observation room - replacing his measly £190m boat At 468ft in length, with ship masts nearing 300ft high, 'Sailing Yacht A' is the world's biggest sailing ship The yacht has been built for Russian billionaire Andrey Igorevich Melnichenko out of a German shipyard Cruise speed is 18mph, with a top speed of 24mph. The hull is made of steel, with a teak-finish deck Superyacht expert tells MailOnline that it will be 'very significant ship' once the interior work is completed Mr Melnichenko, whose net worth is estimated at £6billion ($9billion), founded the fertilizer producer EuroChem When money is no object, it pays to keep up with the times. And that's exactly what one Russian billionaire has done as he has upgraded his £190million superyacht for a new model - at a cost of £260million. Andrey Igorevich Melnichenko's 'Sailing Yacht A,' which Mr Melnichenko is thought to have named 'A' to ensure it is listed first in shipping registers, is taking its first sea trials in Kiel, northern Germany. The behemoth is the world's largest sailing superyacht as the Russian industrialist takes his quest to ruling the seas one step further. Melnichenko also owns a Boeing 737. The multi-billionaire already has one luxury home on the seas - the Motor Yacht A - but has this time turned his attention to sailing power. The epic vessel boasts a staggering eight decks and its keel incorporates one of the largest single pieces of curved glass ever made at 193 square feet and weighs a whopping 1.8 tons. It dwarfs other famous super-yachts like The Maltese Falcon, which is 298ft and weighs 1,367 tons. Cruise speed of the ship is 18mph, with a top speed of 24mph. The hull is made of steel, with a teak-finish deck. This has been used to create a stunning observation pod on the bottom of the vessel so Mr Melnichenko and Serbian model wife Aleksandra, can enjoy stunning views of the sea. This new superyacht will be nearly twice the length and over twice the width of the Cutty Sark. She will instantly become an inspiration to cargo ship owners, and a floating demonstration that sails - combined with the latest materials and technology - mean that dirty diesel engines are no longer needed as the primary means of propulsion. 'The green lobby should be celebrating - as cargo ships are significant CO2 contributors. 'The masts were built by Magma Structures in Portsmouth - just a stone's throw from another well known sailing vessel, HMS Victory, which is less than half the length of this new superyacht.' Sarah Johnson from Magma Structures told MailOnline Travel: 'We are really proud of the team who build these masts, that are the largest free-standing rigs in the world. 'We are the only company who can produce structures like this of this size, it's great for Britain to be involved.' Boat International reports that the previous argest sailing yacht on the water is 96.35 metre Sea Cloud, a classic beauty launched in 1931, followed by the modern falcon-rigged iconic yacht Maltese Falcon at 88 metres LOA. Sailing Yacht A will handily surpass both of these.