Sail Power: The Complete Guide to Sails and Sail Handling

150 per cent adjustment aerodynamic afterguy air flow amount angle of attack apparent wind apparent-wind angle APPARENT-WIND SPEED athwartship attached boat speed boom boom vang cent genoa center of effort centerboard centerline clew cloth cockpit crew cruising boats Cunningham curvature curve Dacron deck Decksweeper direction double-head rig downhaul downwind draft control ease excess farther foot fore and aft foreguy foretriangle forward girth halyard headsail headstay heel helm hull inboard increase International Offshore Rule Jam Cleat jib or genoa jibe Knots Apparent-wind lee side leech leeward lift light air load luff tension mainsail mainsheet maximum measurement mechanical advantage mizzen mizzen staysail move naker nylon one-design outboard outhaul overlap pole end position pull racing rated sail area reef sailcloth sailing angle sailmaker shape sheave sheet tension shrouds slot spinnaker pole star-cut staysail stretch tack track traveler true wind twist vang weight winch wind velocity