"Steven P. McNicoll" wrote:
Yes there is. RAIM provided integrity. As long as no signal error
exists (vast majority of the time) then your assertion is basically
correct.


How does RAIM provided integrity make a practical difference?

In the event of a signal error that could cause a position error of
hundreds of miles you would be alerted. Otherwise you might
accurately follow a slowly drifting position from GPS into terra
firma.

Ron Lee