A great day out for all the family, explore each of the five decks at this top attraction in Edinburgh and discover what life was like on board Queen Elizabeth II's former floating palace. Britannia was the first Royal Yacht to be built with complete ocean-going capacity and designed as a Royal residence to entertain guests around the world. When she was decommissioned in 1997, it marked the end of a long tradition of British Royal Yachts, dating back to 1660 and the reign of Charles II.