What Is Waas - Furuno SC-110 Operator's Manual

APPENDIX

6. What is WAAS?

WAAS, available in North and South America mainly, is a provider in the worldwide SBAS
(Satellite Based Augmentation System) navigation system. SBAS 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), EGNOS (Euro Geostationary Navigation Overlay Service) and
GAGAN (GPS Aided Geo Augmented Navigation). All providers are compatible with one
another, thus providing seamless position fixes to SBAS users. The illustration below shows
the coverage area of the SBAS. (Accuracy may be affected when using a GEO satellite not
within your current location.) This manual uses WAAS for these three providers generically.
EGNOS
Provider
WAAS
EGNOS
MSAS
GAGAN
AP-12
GAGAN
Satellite type
Intelsat Galaxy XV
TeleSat Anik F1R
Inmarsat-3-F2/AOR-E
Artemis
Inmarsat-3-F5/IOR-W
MTSAT-1R
MTSAT-2
Inmarsat-4-F1/IOR
WAAS
MSAS
Longitude
133 W 135
107.3 W 138
15.5 W 120
21.5 E 124
25 E 126
140 E 129
145 E 137
64 E 127
Satellite No.