Sail trim is the art of setting sails in response to the varying conditions of wind, waves, boat speed and desired course. Good sail trim can mean the difference between winning and losing a race or reaching harbor before the tide turns. This book demystifies the skill of good sail trim with the aid of superb color diagrams and photographs, to enable racers and cruisers alike to sail efficiently and get the most out of their boats. Taking account of any type of wind condition, the author explains: Aero- and hydro-dynamics, Rig types, The best way to rig a vessel, Sail cloth and cut, The right trim for mainsail and genoa & Sailing before the wind. 128 pages. 2005. Paperback.