Originally Posted By: Bingley
<snip> 5. Kyptonite foil? Adamantium foil? Taking nominations.<snip>


There's molybdenum foil, as here:
http://www.elmettechnologies.com/products/Molybdenum/foil.php#calc
http://www.2spi.com/catalog/standards/molybdenum-moly-foil.shtml

at $160 for a 1.3 gram 2"x2" square of 2 mil foil, from the second source, though, gold or platinum foil would be cheaper.

-rafowell
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A signal mirror should backup a radio distress signal, like a 406 MHz PLB (ACR PLB) (Ocean Signal PLB)