Furuno Sc 50 manual What is WAAS?, AP-14

APPENDIX

7. What is WAAS?

WAAS, available in North America, 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. 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 provides will be compatible with one another, thus providing “seamless” position fixes to SBAS users.

150° W	120° W	90° W	60° W	30° W	0	30° E	60° E	90° E	120° E	150° E
60° N											60° N
40° N							EGNOS			MSAS	40° N
20° N											20° N
0				122	120		131			134	0
	WAAS
20° S											20° S
40° S											40° S
60° S											60° S
150° W	120° W	90° W	60° W	30° W	0	30° E	60° E	90° E	120° E	150° E
Satellite, Region		Position
120, AOR-E		15.5° W
122, AOR-W			54° W
131, IOR			64.5° E
134, POR			178° E

At the time of this software release, only WAAS is operational. During the developmental period in other areas, which may last for several years, there is no guarantee of the accuracy, integrity, continuity, or availability of the SBAS signal. 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 while using the SBAS signal.

Note: This manual uses “WAAS” when referring to any SBAS provider.

AP-14