Downloading a GE image at the altitude you require is the first step.
The data then needs to be worked on to make it useable in your montana.
It is worth reminding readers that GE images are made by a very clever bit of software which
'stitches' pictures, scans, drawings etc to make a 'map'.
Timelines, data and details cannot be accurately determined so remember that what your display
shows you is not necessarily what you will see 'on the ground'.
Then, at times, you'll be amazed how good it can be!
All very time consuming to put together but useful if you don't have any other mapping.
For Mongolia (and anywhere you do not have good maps) IMHO, it would be best to create a datase of as
accurate as possible waypoints, switch your Montana to the compass page (CDI layout), edit the fields and learn/know how to navigate in 'off road' mode.
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