[extropy-chat] Worldwide SOS system

[Damien Sullivan]

>    Sadly, I'm pretty sure if you have the means to build a sign visible
>    from orbit, you have more than sufficient means to reach civilization,
>    so the lost in the wilderness stories stay. It's a clever idea,

Top spy satellites are said to have a resolution of 5-6 inches.  There are
probably stories about stranded people making Big Signs in hopes of some plane
seeing them.

Heck, Martha tried that in _Marooned in Realtime_, I think.

-xx- Damien X-)