Garmin 278 Manual De Propietario

The European Geostationary Navigation Overlay System (EGNOS) 

is European Space Agency developed service to improve the overall 

integrity of the GPS signal and increase position accuracy for users 

in Europe. In North America, EGNOS is referred to as WAAS.
The system is made up of satellites and network of ground reference 

stations positioned across Europe that monitor GPS satellite data. 
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 EGNOS/WAAS on your Garmin GPSMAP 278 

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 EGNOS/WAAS 

on your Garmin GPS receiver, the receiver automatically uses the 

method that achieves the best accuracy. To enable EGNOS/WAAS, 

see to page 

6

.

 

LORAN C is a radio navigation aid operated and maintained in the 

United States by the United States Coast Guard. LORAN  

(LOng RAnge Navigation) system covers the entire United States 

and the U.S. Coastal Confluence Zone. From the perspective of a 

mariner, the system is used for ocean and coastal navigation. It can 

be used as a supplemental system for harbor and harbor approach 

navigation, and it is used for inland navigation by recreational 

vehicles. 

The LORAN TD (Time Delay) feature eases the transition from 

using LORAN to using GPS. The GPSMAP unit automatically 

converts GPS coordinates to LORAN TDs for those who have a 

collection of LORAN fixes for favorite fishing spots and other 

waypoints recorded as TDs. You can display your location as a TD 

or enter waypoints as TDs. The accuracy to be expected from this 

conversion is approximately 30 meters. When the unit is placed 

in the LORAN TD format mode, it simulates the operation of a 

LORAN receiver. Position coordinates might be shown as TDs, 

and all navigation functions may be used as if the unit was actually 

receiving LORAN signals.

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W

HAT

 

IS

 EGNOS/WAAS/MSAS 

AND

 LORAN TD S

ETUP