WATCHING a movie under the stars, scuba diving, jet skiing, a dip in the 20-person jacuzzi - all aboard the biggest single masted yacht ever built.

All this can all be yours for £140,000 a week although it might add up to more once you have paid for the high-speed internet connection, energy to heat the sauna and tidal pool and a ten per cent tip for the 12-man crew.

The £30m Mirabella V was unveiled yesterday, just days before her maiden voyage.

US businessman Joe Vittoria's latest baby was the last ship to be launched from Vosper Thornycroft's Southampton shipyard at Woolston.

The super yacht, 246ft long with a 295ft high mast, is now moored alongside warship HMS Mersey at Portsmouth Naval Base. It will leave for a nine-day trip to Luciana Vittoria's hometown of Naples on Saturday where the wife of the former Avis car hire boss will be able to show off her carefully-chosen dcor to family and friends.

After a series of engagements in Europe, the 75m sloop will be available to charter in the Mediterranean during the summer, switching to the Caribbean for winter. Mr Vittoria believes Mirabella will prove the ultimate in billionaire's toys.

He joked: "There are 585 billionaires and I only need 12 of them. You need a month on Mirabella V to truly appreciate her.

"The result off all this hard work is a yacht that will attract superlatives wherever she goes and she's a huge credit to all those who have been involved.''

Despite the price tag, the yacht has already been booked for a month over the Christmas and New Year period.

Mirabella V will carry up to 12 passengers in with facilities on board including a more than 600-bottle wine cellar, an outdoor cinema, dip pool and indoor or outdoor gymnasium.

Guests will also be able to sail small yachts and have their own 29ft motor launch from a garage at the stern of the vessel.

VT bosses describe the operation, which took three years from design to delivery, as one of the most demanding technical challenges in nearly 150 years of shipbuilding.

Managing director Peter McIntosh said: "Mirabella V is one of the most significant ships built by VT in the company's long history. Our reputation and strength is based on naval shipbuilding but we are proud to have built the world's most famous yacht here in the UK."