Programming With Datum Or Variation - Yacht Devices YDTC-13 User Manual

V. Programming with Datum or Variation
This method suitable for Devices with any firmware version. To program the Device
with this method, you must connect it to a network with a chart plotter. This method
of programming is tricky, but is compatible with virtually all NMEA 2000 chart
plotters.
Figure 1. Setting the chart datum and magnetic variation on Raymarine c125
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