Catamarans come in all different sizes and you may have crossed a few seas in large engine-powered ones as they ferry passengers to and from islands. But catamarans can also be used for pleasure and personal use, and come in smaller designs equipped with a sail for gliding along the water, and hulls that reduce the drag on the water. Although boats are complex, catamaraning is actually very easy to do and lots of fun. All you need is a partner and the ability to lean and youêre off, manoeuvring and sailing like a pro. .