Schooners, ketches, and yawls are sailing boats with two or more masts.
Schooner: multiple sails with two to seven masts. The aft mast is taller than the forward mast(s). This type of sailing craft was made popular in Colonial America. The most common type of schooners, those with two masts, were often used for slaving, privateering, and blockade running.
Ketch: two-masted sailing boat with the steering rudder and station behind both masts. The aft mast is shorter. “Ketch” comes from the Middle English “cache” meaning “to catch.” Originally, this type of craft was used as a fishing boat.
Yawl: two masted sailing boat with the larger mast forward and the aft mast (called the mizzen mast) behind the steering rudder and station.
Shown below are some photographs of schooners, ketches, and yawls in Port Townsend, Washington.