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A distress sign that is visible by air but isn't easy to detect from the ground. This idea extends proven line-of-sight and radio distress signal ideas with new air based detection technology to enable people in remote locations to signal for help.

A distress sign that is visible by air but isn't easy to detect from the ground. This idea extends proven line-of-sight and radio distress signal ideas with new air based detection technology to enable people in remote locations to signal for help.

Photo of Nalin Perera
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Nalin commented on Ground-to-Air S.O.S.

I think your idea of coupling emergency signals (those that a community can put together in a hurry), yet visible from above may be the missing link. The way I wrote the initial idea, a major drawback is that it's not something people could do in a crisis. At best, it's an early distress signal before a crisis occurs.

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Nalin commented on Ground-to-Air S.O.S.

Good point on folk not having time to setup a large distress sign during a crisis. Perhaps the important thing is to define a global ground-to-air distress sign. So that regardless of the size of the sign anyone seeing it would immediately recognize it as a distress signal.

I like your idea on detecting unusual changes. What I was worried about was how to filter out false signals. Also, like the idea of auto detecting changes using algorithms. All these together, a unique distress pattern, algorithmic and automated processing may make this a workable concept!