The two new sailing yachts to join the Lungarno Collection—Alix and Highland Breeze—are ideal for travelers seeking short-term charters this season. The Lungarno Collection’s president, Leonardo Ferragamo, introduced sailing yachts from Nautor’s Swan (where he is the chairman and a co-owner) to the hospitality group’s repertoire of vacation options last summer with Solleone 90 and Virago. With the addition of the 90-footAlix and the 112-foot Highland Breeze, the group’s largest yacht, the Lungarno Collection n…