In sailing, a course sail is the principal sail on a mast. Sailing is the art of controlling a Sailing vessel. By changing the Rigging, Rudder and dagger or centre board a Sailor manages the force
This term is used predominantly on square rigged vessels, referring to the largest and lowest sail on each mast (mizzen-course, main-course and fore-course). Square rig is a generic type of sail and rigging arrangement in which the primary driving sails are carried on horizontal Spars which are perpendicular or square Gaff-rigged vessels might possibly use the term (for the lowest sail rigged aft of each mast), but are more likely to refer simply to a mainsail, foresail, etc. Gaff rig is a Sailing rig (configuration of sails in which the Sail is four-cornered Fore-and-aft rigged controlled at its peak and usually A Bermuda- or lateen-rigged yacht, whether sloop, cutter, ketch or yawl, would not usually be described as having a course. The term Bermuda rig refers to a configuration of mast and Rigging for a type of Sailboat and is also known as a Marconi rig; this is the typical For the military definition of sloop see Sloop-of-war. For the open learning project see SLOOP Project. When used in a nautical sense a cutter is a small single-masted vessel Fore-and-aft rigged with two or more Headsails a Bowsprit, and A ketch is a Sailing Craft with two masts: a main mast and a shorter Mizzen mast abaft (rearward of the main mast YAWL (Yet Another Workflow Language is a Workflow language based on the Workflow patterns.