GPS often fails in dense cities with tall buildings. Also in mountainous areas with sharp terrain like the Julian Alps. I imagine a dense jungle could pose sim

GPS often fails in dense cities with tall buildings. Also in mountainous areas with sharp terrain like the Julian Alps. I imagine a dense jungle could pose similar challenges. If nothing else, a gps won’t help if you can’t find a route to where it’s telling you to go because the jungle/river/valley is impassable.