Planes also have ELB/ELTs Emergency Locator Beacons/Transmitters.
These can be operated by the crew or automatically via a 'G' switch.
https://www.sarsat.noaa.gov/emerbcns.html
Caught earlier today four C-17s all usingMCFAMCcallsigns heading into Guam.
Two from Singapore, one from Sydney Australia, and one from Hawaii.
All four would've arrived within a fairly small time of each other.
Camo for when they are posted to Portland. kek.