Windsurf is not less objective than garment for instance. My shoe size varies from 41 to 44 according to brand/models and so on with pants, shirts, jackets. May be an inherent unaccuracy in textile manufacturing or changes happening between design and production, plus each brand may have his own method of measuring. Anyway you can't compare different sail models by their "exact" surface, whatever it is. And for similar cuts, boom length seems a better raw indication of power. IMHO the top is designed for low drag so a few more cm do not matter that much. This been said it is true that board volume could and should be accurate, although it is just one amongst many factors. Over the years I've been trying dozens of 100ish boards. Some were real pontoons and others semi-sinkers (for a stable bodyweight of course).
Last edited by Farlo; 22nd August 2011 at 04:29 PM.