Point of sail is a term used to describe a sailing boat's orientation in relation to the current wind direction.
Sailboats cannot sail directly into the environmental wind, nor on a course that is too close to the direction from which the wind is blowing. The range of directions into which a boat cannot sail is called the "no-go" zone. Its width depends on the design of the boat, its rig, and its sails, as well as on the wind strength and the sea state. Depending on the boat and the conditions, the no-go zone may be from 30 to 50 degrees either side of the wind, a 60- to 100-degree area centered on the wind direction.