Furuno DUAL GPS GP-150-DUAL - Manual (Page 106)

APPENDEX
AP-12
What is WAAS?
WAAS, available in North America is a provider in the worldwide SBAS (Satellite Based
Augmentation System) navigation system. CBAS 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.
WAAS
MSAS
EGNOS
GAGAN
Provider Satellite type Longitude Satellite No.
Intelsat Galaxy XV 133°W 135
WAAS
TeleSat Anik F1R 107.3°W 138
Inmarsat-3-F2/AOR-E 15.5°W 120
Artemits 21.5°E 124 EGNOS
Inmarsat-3-F5/IOR-W 25°E 126
MTSAT-1R 140°E 129
MSAS
MTSAT-2 145°E 137
GAGAN Inmarsat-4-F1/IOR 64°E 127