We had seen the masts of this sailing vessel from our hotel so decided to go see what it was. It appeared to be a private boat that was docked by the pavilions where the queen and her entourage wait to board the royal yacht. Thanks to Lynn, here is what this ship actually is http://en.wikipedia.org/wiki/Club_Med_2

"Club Med 2 is a five-masted computer-controlled sailing ship owned and operated by Club Med and operated as a cruise ship. It combines the power of seven computer-operated sails with more traditional diesel-electric power, having four diesel generators that power two electric motors.

"The Club Med 2 was launched in 1992 in Le Havre, France.

"The ship, one of the largest sailing cruise ships in the world, carrying up to 386 passengers with a crew of 214, sails the waters of the Mediterranean and Adriatic Sea in the summertime, and the Caribbean in the winter, finding her way into anchorages larger cruise ships cannot reach.

"The ship provides ballroom dancing, bridge and music, and sails at night making a stop each morning. A water sports deck can be deployed from the stern. The Club Med 2's European destinations include ports in the Mediterranean, Adriatic, and Aegean Sea. Transatlantic voyages are offered in the spring (eastbound) and fall (westbound)."