Resolution
Well-known member
Not quite right: it is apparent wind speed AND direction that affects sails and handling. So instead of two factors, why not just refer to one single measurement? So on my boat with TWS 15 knots I am preparing to reef if going upwind. For off wind legs I know we can carry full sail a bit higher, to 20 knots TWS.Why would you base your reefing on true wind speed? Apparent is what affects sails and handling.
Another reason for tracking TWS at all times is that it is all too easy to be lulled into a sense of security when running downwind . From personal physical sensations one can miss a steady increase in true wind, leading to problems when changing course to upwind.
Fundamental to either method of course is to know what the wind is doing and be ready for changes.