linguistic:paraphrasing
Lateral resistance

Sailboats use some sort of underwater foil to generate lift that maintains the forward direction of the boat under sail. Whereas sails operate at angles of attack between 10° and 90° incident to the wind, underwater foils operate at angles of attack between 0° and 10° incident to the water passing by. Neither their angle of attack nor surface is adjustable (except for moveable foils) and they are never intentionally stalled, while making way through the water. Heeling the vessel away from perpendicular into the water significantly degrades the boat's ability to point into the wind.