Garmin 192c Manuale Proprietario

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 WAAS 

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 DGPS?

The Wide Area Augmentation System (WAAS) is an F.A.A. funded 

project to improve the overall integrity of the GPS signal. It is 

a space-based system that broadcasts integrity information and 

correction data as determined by ground reference stations. WAAS 

testing completed in September of 2003 confirmed an accuracy of 2 

to 3 vertical meters throughout the majority of the continental U.S. 

and portions of Alaska. For more information, go to  

http://gps.faa.gov/Programs/WAAS/waas.htm.

The U.S. and Canadian governments (among others) have set up 

Differential GPS (DGPS) stations to transmit correction signals. 

They are operational in coastal areas and on many navigable river 

systems. The DGPS system is available for use without a fee. 
Please refer to the U.S. Coast Guard’s Web site,  

http://www.navcen.uscg.gov/ for locations and the status of the 

differential sites. Using DGPS requires additional equipment.