Emergency Signaling
When technology fails, simple physical methods remain. They are reliable and do not require batteries.
Emergency Whistle
The basis of every EDC kit. The sound of a whistle carries much further than a scream and uses less energy. The international distress signal is 3 short blasts.
• • • (3 short)
Signaling Mirror (Heliograph)
Allows reflecting sunlight towards an aircraft or rescuers. The flash range can be up to several kilometers.
Light Signaling
Flashlights with strobe or SOS mode. Visible from many kilometers at night. Remember spare batteries.
• • • — — — • • • (SOS)
Ground-to-Air Signals
Arranging signs from contrasting materials (stones, branches, clothes). "V" - require assistance, "X" - require medical assistance, "N" - No, "Y" - Yes.
V (Help)
X (Medic)