We do have a system for people. The system depends on you have a 406
EPIRB onboard and deploying it in the event of an emergency. Its
position is triangulated by SARSAT (or sometimes given by an onboard
GPS) and the SAR guys come out and look for you where the EPIRB is (if
there is anyone around). The system is not infallible and many times
you may be too remote for anyone to get to. Basically, prepare like you
are on your own.