What Is Waas - Furuno GP-3500F-D Operator's Manual

WHAT IS WAAS?

WAAS (Wide Area Augmentation System), available in North America, is a
provider in the worldwide SBAS (Satellite Based Augmentation System)
navigation system. This system provides GPS signal corrections to SBAS users,
for even better position accuracy, typically better than three meters. There are
three more SBAS providers, MSAS (Multi-Functional Satellite Augmentation
System) for Japan, EGNOS (Euro Geostationary Navigation Overlay Service) for
Europe and GAGAN (GPS And GEO Augmented Navigation) for India. The
illustration below shows the coverage area. (Accuracy may be affected when
using a GEO satellite not within your current location.) This manual uses
"WAAS" for these three providers generically.
EGNOS
WAAS
EGNOS
MSAS
GAGAN
AP-10
GAGAN
Provider Satellite type
Intelsat Galaxy XV
TeleSat Anik F1R
Inmarsat-4-F3
Inmarsat-3-F2/AOR-E
Artemis
Inmarsat-4-F2
MTSAT-1R
MTSAT-2
Inmarsat-4-F1
WAAS
MSAS
Longitude
133˚W
107.3˚W
98˚W
15.5˚W
21.5˚E
25˚E
140˚E
145˚E
64˚E
Satellite No.
135
138
133
120
124
126
129
137
127