Garmin GPSMAP 296 Manual De Usuario

•  Check Beacon Wiring—the DGPS setting is enabled in the 

Interface sub tab on the Main Menu but no DGPS device is 

detected.

•  No Beacon Signal—DGPS receiver is attached, but not 

transmitting RTCM data to GPS.

•  Tuning Beacon—the receiver is tuning manually to a DGPS 

frequency.

•  Using Differential—the unit is receiving DGPS corrections.
•  Scanning for Beacon—the DGPS receiver is scanning for an 

available frequency.

The Wide Area Augmentation System (WAAS) is an FAA-funded 

project to improve the overall integrity of the GPS signal and 

increase location accuracy for users in North America. 
The system is made up of satellites and approximately 25 ground 

reference stations located across the United States that monitor GPS 

satellite data. Two master stations, located on either coast, collect 

data from the reference stations and create a GPS data correction 

message. 

According to the FAA’s Web site, testing of WAAS in September 

2002 confirmed an accuracy performance of 1–2 meters horizontal 

and 2–3 meters vertical throughout the majority of the continental 

United States and portions of Alaska.
WAAS is just one service provider that adheres to the MOPS 

(Minimum Operational Performance Standard) for global Satellite 

Based Augmentation Systems (SBAS). Eventually, there will 

be several services of worldwide geostationary communication 

satellites and ground reference stations. 
All SBAS systems use the same receiver frequency; therefore, any 

operational SBAS system should be capable of providing your GPS 

unit with increased accuracy at any location in the world. 
Currently, enabling WAAS on your Garmin GPSMAP 296 in regions 

that are not supported by ground stations may not improve accuracy, 

even when receiving signals from an SBAS satellite. In fact it can 

degrade the accuracy to less than that provided by GPS satellites 

alone. For this reason, when you enable WAAS on your Garmin 

GPS receiver, the receiver automatically uses the method that 

achieves the best accuracy. To enable WAAS, refer to 

For more information, go to  

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