Signaling
Aim a signal mirror at an aircraft
A signal mirror is visible 20+ miles on a clear day — but only if you aim it.
MNWoodland — How to Use a Signal Mirror
Step-by-step
Hold the mirror close to your face and sight through the aiming hole (or over the top edge).
Extend the other hand as a V with two fingers framing the aircraft.
Tilt the mirror until the bright spot from the sunbeam lands on your fingers.
Sweep across the aircraft repeatedly — a moving flash catches attention.
Even without a proper mirror, use a phone screen, CD, or polished can lid the same way.
Related outdoor skills
Educational reference only. Wilderness conditions change fast — practice in low-stakes settings, take a certified wilderness first-aid course, and confirm regional regulations before you rely on any of these skills in the field.