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WHAT IS WAAS?
WAAS, available in North America, is a provider in the worldwide SBAS (Satellite Based
Augmentation System) navigation system. An SBAS provider furnishes GPS signal corrections
to SBAS users, for even better position accuracy, typically better than three meters. Two more
SBAS providers are also currently under development, MSAS (Multi-Functional Satellite
Augmentation System) for Japan and EGNOS (Euro Geostationary Navigation Overlay Service)
for Europe. All providers will be compatible with one another, thus providing “seamless” position
fixes to SBAS users.
At the time of this software release, WAAS is still in the developmental phase. During this
developmental phase, which may last several years, there is no guarantee of the accuracy,
integrity, continuity, or availability of the WAAS signal. Therefore, FURUNO will accept no
responsibility for the use of the signal for other than the above stated purpose. It is the user’s
responsibility to exercise common prudence and navigational judgment when using the WAAS
signal.
150°W 120°W 90°W 60°W 30°W 0 30°E 60°E 90°E 120°E 150°E
150°W 120°W 90°W 60°W 30°W 0 30°E 60°E 90°E 120°E 150°E
0
20
°S
40
°S
60
°S
20
°N
40
°N
60
°N
0
20
°S
40
°S
60
°S
20
°N
40
°N
60
°N
WAAS
EGNOS
MSAS
Satellite, Region Position
120, AOR-E
15.5°W
122, AOR-W
54°W
131, IOR
64.5°E
134, POR
178°E
131
134
122
120
Expected operations capability
WAAS: 2003
EGNOS: 2004
MSAS: 2005
Note: This manual uses “WAAS” when referring to any SBAS provider.