'Just watching NOVA...
And some professor and his students @ Penn State have developed some of
those four blade drones that have self autonomous robotic almost Artificial
Intelligence capabilities that operate in "Swarms".
Incredible effectiveness @ (Group) "Swarm" search patterns for Lost Hiker's
cell phone signals.
Much,much faster than traditional humint searches,as the little robotic drones
have the ability to self correct for false signal strength,Etc.,Etc.

Yeah,I Know if the Silly "Hiker" had a Satellite based E.P.I.R.B. Nothing more
than a single S.A.R 'Copter with rescue swimmers would be needed.

BUT, how many "Hikers" take ANY kind of emergency gear...

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Then.
The flip side is the Goombah with all the excellent emergency RF gear
whose kids trip the "EMERGENCY" switch during a backyard campout.

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'84 300SD sold
124.128