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Custom Grid System For Garmin Gps When Fire Fighting

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Hello everyone,

When supporting fire fighting crews, they tend to make their own grid system to the maps, dividing sectors into finer resolution and/or giving the Long coordinates letter identifiers and the Lat coordinates numbers in the Fire Zone.

Does any body have experience in how to create and setup a custom grid/custom map on the Garmin GPSmap (I have the Garmin 296)?


I would appreciate some guidance on how to do this.


Many thanks.



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