Blanketing Meaning in Sailing

Blanketing describes a situation where one boat blocks the wind from reaching another boat. The windward boat creates a shadow of calm air directly behind its large sails. This maneuver significantly slows down the trailing vessel by starving its sails of power. Strategic sailors use this technique during races to gain a physical advantage over rivals. The blocked boat must turn away to find fresh air and regain its speed. One example occurs when a large yacht sails directly upwind of a smaller boat. The smaller boat loses its forward momentum because the sails no longer fill. This tactic requires precise positioning to keep the opponent trapped in the windless zone. Managing the airflow around the boat determines how fast the vessel can travel. Avoiding the blanket of another sail ensures a boat maintains its maximum possible velocity.