One of the most capacious boats in its class, the 45-foot Sessa Fly 45 (www.sessamarine.com) has an interior that seems even larger than it is. The boat’s flexible layout allows for two or three 200-square-foot guest cabins belowdecks, as well as a full galley and three heads. The main deck has room for a breakfast nook and an aft lounge, plus a hydraulic swim platform that lowers from the stern. The 180-square-foot flybridge comfortably hosts as many as 10 guests. Launched in September, the model comes from the family-owned Italian yard Sessa Marine, a boutique manufacturer that produces yachts as large as 68 feet.