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C Commands Summary
92 MiLLennium Command Descriptions Manual
MAGVAR
The GPSCard computes directions referenced to True North. Use this command (magnetic variation correction)
if you intend to navigate in agreement with magnetic compass bearings. The correction value entered here will
cause the "bearing" field of the
NAVA/B and GPVTG logs to report bearing in degrees Magnetic. The magnetic
variation correction is also reported in the
GPRMC log.
Syntax:
Example:
magvar +15.0
Figure C-3 Illustration of Magnetic Variation & Correction
MAGVAR correction
Syntax Range Value Description Default
MAGVAR - Command
correction ± 0 - 180 The magnetic variation correction for the area of navigation in units of degrees.
Magnetic bearing = True bearing + Magnetic Variation Correction
See Figure C-3.
0.000