When sailing into a lull, your boat’s apparent wind moves forward. This is indicated by the sail luffing, windward telltales dancing or an obvious loss in power. You can see a lull coming by noticing the lighter shading on the water. A header would likely have a bigger impact on luffing the sail. In a header, bear away to maintain flow across the windward side of the sail, which instantly gives you more power. Don’t bear away in a lull. Your apparent wind will stay forward as you bear away, making it difficult to find more force in the sail, and easy to stall and sail extra distance. Typically, in boats that carry more momentum, you can sail into a lull and momentarily sheet on, blading the sail to reduce drag as your apparent wind moves forward. This solution will vary depending on what type of boat and how drastic the drop in wind velocity is. After slowing, the apparent wind shifts aft and requires a more forgiving sail setup that provides more power. On dinghies where mainsheet changes mast bend, sheet out to increase camber in the top of the sail. On boats where the mainsheet affects leech twist, easing to open it increases the velocity across the leeward side of the top of the sail.