Variation

Variation is the local difference between True North (which does not change) and Magnetic North, which changes slightly each year. Typically, cartography uses True North, and Magnetic North is the direction in which a magnetic compass points. Variation changes depending on your geographic location and date. The Variation menu provides options to compensate for variation.

VariationThe following options are available:

  • Variation modeVariation mode — Variation mode can be set to the following:

    • On — With variation switched on, you can set the amount of variation compensation, using the Variation range option (see below).

    • Off — With variation switched off, variation compensation will not be used.

    • Slave — When networked to another device (e.g.: an MFD or pilot controller) providing magnetic variation, the display will automatically switch to slave mode and use the variation provided by that device.

  • Variation rangeVariation range — When Variation mode is switched on, your magnetic heading readings will be adjusted (compensated) by the amount specified.