"Peter Dohm" wrote in message
.. .

In view of my recollections of ground school, I believe that it might be
least confusing to continue using the term deviation for the instrument
error as installed, variation for the difference between true and magnetic
north, and inclination for the angle between the lines of force and the
horizontal--leaving the term declination unused.


You could use declination for the difference between the magnetic variation
a VOR is set to and the actual local magnetic variation.