4 ms·
Compass, Altimeter, topographic maps, notes about the route that I've made. Even a watch can aid navigation if you can calculate your speed and see any terrain
by jschwartzi 9y ago
Compass, Altimeter, topographic maps, notes about the route that I've made. Even a watch can aid navigation if you can calculate your speed and see any terrain features.
If anything doesn't jive with what I expect or what I'm seeing I try to understand why.