On Sun, 09 Dec 2018 15:16:47 -0700, Chris L Peterson
wrote:
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.

True. To avoid war zones, tropical cyclones and the like. Someone who
points his Goto telescope only must avoid the Earth. And perhaps also
the Sun during daytime.