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Course made good (C.M.G. or Course Over Ground) - the actual route taken to achieve the journey's objecting measured over the ground. It is the resultant of the course steered and the effect on that course of any wind and tide. Sail trim - pulling the sail in when sailing upwind and letting it out when sailing downwind.
Filled with wind, the sail has a roughly spherical polygon shape and if the shape is stable, then the location of centre of effort is stable. On sailing craft with multiple sails, the position of centre of effort varies with the sail plan. Sail trim or airfoil profile, boat trim and point of sail also affect CE.
The forces transmitted via the sails are resisted by forces from the hull, keel, and rudder of a sailing craft, by forces from skate runners of an iceboat, or by forces from wheels of a land sailing craft which are steering the course. This combination of forces means that it is possible to sail an upwind course as well as downwind.
The course sail is the lowermost sail. In sailing, a course is a type of square sail. It is the sail set on the lowest yard on a mast. The courses are given a name derived from the mast on which they are set, so the course on the foremast may be called the fore-course or the foresail; similarly main-course or mainsail for that carried on the ...
The United States Coast Guard Training Center (TRACEN) in Yorktown, Virginia, is one of eight major Coast Guard training facilities in the United States.The others are Training Center Petaluma, Training Center Cape May, Aviation Training Center, located in Mobile, Alabama, Leadership Development Center, located in New London, Connecticut, Maritime Law Enforcement Academy, located in Charleston ...
The primary advantage of adjusting the cunningham is the speed and ease with which the luff tension can be changed while sailing or racing. By either hauling or easing the line, the tension in the luff can be changed, thereby shifting the point of maximum draft of the sail forward or aft respectively, optimizing sail shape and thus performance ...
Sometimes the Olympic triangle is used as a course for dinghy races where space permits, particularly for events where there ought to be little local advantage such as State and National titles and for classes which are mainly displacement sailing such as the Heron (dinghy). The olympic triangle is the most popular choice for dinghy racing, but ...
Jibing is also common in racing, which often uses a triangular course marked with buoys; the most direct way of rounding a buoy may be to jibe. Jibing occurs less commonly than tacking, since a sailboat can sail straight downwind, whereas it cannot sail directly into the wind and has to sail a zig-zag course at alternating angles into the wind.