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Old December 9th 18, 11:16 PM posted to sci.astro.amateur
Chris L Peterson
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Default Lat/Long and timekeeping system for Mars

On Sun, 09 Dec 2018 21:27:00 +0100, Paul Schlyter
wrote:

Even traveling in undeveloped countries in remote regions, the most
reliable way of planning and executing travel is using a map app

and a
GPS.


True, and that includes hiking. However you must still decide which
route you want to take, you cannot just "point yourself" to the
destination.


That's generally true even for air traffic.