Little Navmap uses the magnetic
is stored either with VOR stations (calibrated declination) or the actual environment declination. The
latter one is calculated by the program using the world magnetic model.
(WMM) or loaded
from the simulator scenery database.
Note that the magnetic declination of a VOR (also: calibration for VOR,
VORDME and VORTAC) may differ from the actual declination in a simulator
region as it does in reality. The calibration of a VOR might be very old
while the real declination in the environment changed in the meantime
due to the movement of the magnetic poles. Therefore, magnetic course
values might differ when flying inbound or outbound a VOR.
Little Navmap offers several options to display course labels along the flight plan line using
VOR calibrated declination or not. This can be changed in Options on page Map Display Labels.