: On my sailboat I have a "differential" GPS which somehow corrected
: for this deliberately induce error....seems that the coast guard figured a
: way around the error to benefit boaters using some sort of low frequency
: broadcast beacon in addition to the satellites.....but it cost more than
: the run of the mill model...a couple of hundred bucks more i
: think....supposed accuracy was improved from 100-50 meters, down to less
: than 5 meters...

: from what you are saying, now all GPS will have this high degree of
: accuracy?? last i heard the fed govt had promised to do this sometime
: within the next seven years...seems that they sped up the timetable....why
: the hell did i spend the extra on my differential GPS?

In the Everett Herald (May 2, 2000) it says. "A more precise method By using any of five ground stations, precise measurements are taken for the Global Positioning Differential System. These are compared to the satellite measurements. Discrepancies are corrected and the location can be pinpointed within one millimeter."

Their words, not mine.

Dale