In article ,
Judah wrote:

"Steven P. McNicoll" wrote in
k.net:


"Roy Smith" wrote in message
...

Oh, come on, this is getting silly. The table is labeled (for
example, on the HPN NDB 16) "FAF to MAP 4.8 NM". That's one point on
the ground to another point on the ground.


Well, the NDB is on the ground, nut the MAP is in the air! : )


Actually, technically speaking, the MAP is a fixed point in space that
happens to be physically above the ground. Howver, it is a fixed point at a
fixed altitude and at a fixed position relative to objects on the ground.

The real question here is, does the NACO chart take into consideration the
relative motion of the earth along it's axis when calculating ground speed?
And if so, do the times change based on the season?

Don't forget continental drift.