As I understand Meshtastic, I see no reason why it wouldn't work in a CERT search & rescue operation.
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The small LoRa mesh radio would work with the searcher's phone and both would be on their person.
To use Sibley Park for example, we would position the fixed relay node as high as possible - like Mt. Tom.
This would tie together the smaller mesh networks that would form between the searchers as they move about.
Assuming the searcher's devices all have GPS, their phones could display a map showing their location relative to the others.
MQTT would enhance this by allowing the cellular network to carry this info to the distant command center.
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I'm sure Ben W0AYE can add more to this.
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73
Mike N0QBH
N0QBH Mike Berg