Your answer was right but you missed the question.

--
Regards, BobF.
"Bill" wrote in message
...
On Jul 22, 1:23 pm, "Jon Woellhaf" wrote:
I've wondered how closely the radial projected by a GPS matches the radial
indicated by a perfectly accurate VOR receiver. Does a sophisticated GPS
have a database that compensates for VOR misalignment due to movement of
the
magnetic north pole over time?

Well. there is a great answer to this conundrum!

If you are in regular "desired track" mode, the GPS box applies a
computed,
local declination value to locate magnetic north.

If you go to OBS mode, the GPS box applies the actual
magnetic correction for that particular VOR.

Most of the VORS need to be twisted to real magnetic north
these days, so there will be a difference.

So if you are using OBS mode to overlay a victor airway you will be
fine,
as the V airways are predicated on lining up real magnetic bearings
from VORs.

Smart things, these boxes.
I'm sure all this is due to global warming.

Bill Hale BPPP instructor