Quick Answer
Discreet communication during emergencies relies on pre-planned coded messages, low-tech methods like flashlights or mirrors, and encryption of digital signals.
Pre-Planned Communication Protocols
Establish a pre-arranged system of coded messages with family members or team members. Use a mix of visual and auditory cues, such as specific hand signals or phrases, to convey basic information like “stay put” or “move out.” For example, flash a whistle three times to signal a need for attention.
Low-Tech Signaling Methods
Utilize low-tech signaling methods like mirrors, flashlights, or flares to convey messages over short distances. For example, flash a mirror towards a target to signal a location. Use a flashlight to signal a code, like three short flashes followed by a long flash to indicate a specific message.
Encryption of Digital Signals
When using digital communication methods like radios or smartphones, employ encryption techniques to secure signals from interception. Use apps like Signal or Wire with end-to-end encryption to protect voice and text messages. For radios, use encryption modes like P25 or DMR to secure transmissions.
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