From Japan to SL

There was an interesting case in the mini-race held on Tuesday. When my yacht was sailing side by side with Blues, suddenly my yacht lost speed. There is an effect called "wind shadowing", where a leeward (downwind) sailboat's wind can be blocked by a windward (upwind) sailboat. Amount of shadowing is a function of distance, wind speed, apparent wind angle, and sail configuration of the blocking boat. This cannot be noticed in personal practice, but please watch it in mini-races when you pass the leeward side.