 Sailboats can be classified according to type of rig, and so a sailboat may be a sloop, catboat, cutter, ketch, yawl, or schooner.A sloop usually has only one headsail, although an exception is the Friendship sloop, which is usually gaff-rigged with a bowsprit and multiple headsails.If the vessel has two or more headsails, the term cutter may be used, especially if the mast is stepped further towards the back of the boat.