In 1991 Star Clippers unveiled a new tall-ship alternative to sophisticated travelers, whose desires included having an adventure at sea but not on board a conventional cruise ship. Star Clippers vessels are four- and five-masted sailing beauties -- the world's largest barquentine and full-rigged sailing ships. Filled with modern, high-tech equipment as well as the amenities of private yachts, the ships rely on sail power while at sea unless conditions require the assistance of the engines. Minimal heeling, usually less than 6%, is achieved through judicious control of the sails.

You wouldn't consider a vacation on traditional cruise ship but are a sailing enthusiast.

You love water sports, particularly snorkeling and scuba diving.

You want to anchor in secluded coves and visit islands that are off the beaten path.

You have a preexisting or potentially serious medical condition. There's no physician on board.

You must have a private balcony -- there are a few, but only in top accommodation categories.

You can't live without room service. Only Royal Clipper has it, and only in a few high-end suites.