A ketch is a type of sailing ship that has two masts. A two-masted fore-and-aft-rigged sailing vessel with a mizzenmast stepped aft of a taller mainmast but forward of the rudder. a small sailing ship with two masts (Probably from catch)
A sailboat with two masts The shorter mizzen mast is aft of the main mast, but forward of the rudder post A similar vessel, the yawl, has the mizzen mast aft of the rudder post