Accuracy is dependent upon the equipment being used.  Most basic equipment is accurate to 25 meters.  Equipment utilizing GPS Differential Beacon Signal (DGPS) receivers deliver positions accurate to within 10 meters, and potentially to 1 meter.  The Wide Area Augmentation System (WAAS) and European Geostationary Navigation Overlay Service (EGNOS) satellites can provide further GPS signal correction to compatible equipment. Only the most expensive professional survey equipment and military systems can achieve centimeter accuracy.

Very substantial applications of GPS technology have been made for marine navigation, and in-vehicle land navigation.  These navigation units range from basic alpha/numeric display units, to advanced cartographic display systems utilizing electronic charts available from several sources.   The most advanced marine systems provide color charts for anywhere in the world, with active ship's RADAR and GPS position integrated into the display.  The least expensive cartographic units are handheld and portable.  The most sophisticated and most accurate, are fixed, mounted units with exterior antennae, DGPS receivers, and connections to other onboard electronic systems.

Certain additional features are available depending upon manufacturer and model.  Generally, the more features included and the more accurate the position reported, the more expensive the equipment.  A wide variety of GPS equipment is manufactured by several companies. 

For special very tall GPS antenna poles see Tripod Systems, GPS Poles & Range Poles
.

Globe Golf Balls 3 to a carton  us$19.95

For further information,   or  Call 1-440-888-4749

Also see Geographic Information Systems, Telescoping Poles, Tripod System, Range Poles, Bulldog PowerPak