Doomsday Defense Topic
Section
Navigation & Signals
Finding your way without GPS, signaling rescuers, and communicating when cell networks are down.
Field notes
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Lost? STOP: Stop, Think, Observe, Plan
The moment you realize you're lost, stop moving. Think, observe and plan. Staying put and making yourself visible usually gets you found faster.
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FRS and GMRS Radios: Talking When Cell Networks Fail
FRS walkie-talkies need no license; GMRS radios share the channels but allow more power and repeaters, with an FCC license. Plus NOAA weather radio.
In the library
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Visual Signaling (Signal Corps Manual No. 6)
The 1910 Army manual on signaling by flag, heliograph, lantern and semaphore, with codes and procedures for sending messages by sight.