As time advances, Moore's Law and improved satellite imaging will at some point enable us to make the query:

In this <geographical area> find this <RGB backpack color value> plus or minus <some color value> sized smaller than <some area value> and greater than <some area value> that <is> or <is not> moving.


Add in the potential benefits of a better Fossett hive mind search and within the decade we just might be able to resolve this search problem from the comfort of our home offices.

In a day or so. Even if the lost soul doesn't carry a GPS transponder.


Verum audaces non gerunt indusia alba. - Ipsi dixit MCMLXXII