Can GPS be *too* accurate? Do I need some XTE??

"Peter Duniho" wrote in message
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"Icebound" wrote in message
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Never having flown a VOR course myself... I still doubt very much that
any two pilots (OR auto-pilots), flying reciprocal headings between two
VORs, would both be able to *simultaneously* hold a course to within 10
feet of the centre-line for the whole course, considering the receiver
errors and that the VOR radial-signal *itself* probably varies more than
that.

I could be wrong.

You are wrong.

For two pilots to *intentionally* stay exactly on course center on a VOR
airway would be challenging, granted. But the airway provides an
"attractor" for airplanes, and inasmuch as the airplanes average toward
the center of the airway, eventually a couple will come along flying the
exact same distance from the actual airway (whether that's 0.0 miles
off-center or 3.9 miles off-center).

Accepted and agreed. "eventually".

But in the GPS case, it is pretty much in "every" case that two aircraft
using those two waypoints will be pretty much in the center.

"Icebound" wrote in message
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But in the GPS case, it is pretty much in "every" case that two aircraft
using those two waypoints will be pretty much in the center.

But "pretty much" still covers quite a bit of ground. There is only an
increased risk of a collision, not a virtual certainty.

"Peter Duniho" wrote in message
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"Icebound" wrote in message
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But in the GPS case, it is pretty much in "every" case that two aircraft
using those two waypoints will be pretty much in the center.

But "pretty much" still covers quite a bit of ground. There is only an
increased risk of a collision, not a virtual certainty.


Oh, for sure.