Running Downwind

Running downwind is a point of sail in which the true wind blows directly or nearly directly from behind the vessel, aligned at approximately 180° (170°–190°) relative to the bow. As described in Wikipedia's overview on points of sail, a sailboat on a run relies primarily on drag rather than aerodynamic lift to generate forward thrust, with the sails acting much like a parachute.

Understanding courses relative to the wind in yachting is essential for efficient sail trimming. When running downwind, the mainsail is eased out almost perpendicular to the centerline, while the foresail is often set on the opposite side in a "goose-winged" (or wing-and-wing) configuration, or replaced by a spinnaker. The primary practical hazard of running downwind is an accidental or uncontrolled gybe, caused by sudden wind oscillations or steering errors that force the boom to swing violently across the deck. To mitigate this risk, crews routinely rig a boom preventer. Practitioners must distinguish between "running" as a steady state point of sail and the act of executing a gybe maneuver. Mastering these concepts is fundamental alongside practicing essential sailing maneuvers for beginners to maintain safety while sailing off the wind.