Magnetic Model Updates

Sparton digital compasses use a spherical harmonic model to calculate the magnetic variance. This variance is then used to adjust the magnetic heading to indicate a true north heading. In order to retain accuracy, the magnetic model must be updated every five years. A software program is available on the supplied CD (sent with each digital compass purchase) that will assist in downloading new coefficients into the Sparton digital compass. This only affects the calculation of true heading and does not affect the magnetic heading accuracy. Additional magnetic model update information can be found within the Sparton Digital Compass User Document in the Magnetic Model User Updates section.

Download the Sparton Digital Compass Magnetic Model Software Upgrade

Sparton Electronics - 5612 Johnson Lake Road - DeLeon Springs, Florida 32130 - 386-740-5472