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Old 24th Nov 2009, 15:51
  #106 (permalink)  
Join Date: Mar 2002
Location: Surrey, UK
Posts: 834
Come to think of it, if you need a marker that's detectable at low concentrations and remotely (for example, from a maritime patrol aircraft), isn't the answer a radioactive substance? It's been done for various purposes.

No point putting it in the fuel for reasons given above. But some kind of structure designed to breach easily could do it. Of course, using teh radiations would run into all kinds of other problems (just think what the chemtrail types would say - or is that a feature, not a bug?)
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