I see that the FB group is citing the need for a RECCO system, since they are used in SAR. Some clarification so no one goes with this point!
RECCO systems are to guide a rescuer to an AVALANCHE victim. Sometimes they are hand-carried, sometimes they can be airborne. The transponder is built into many ski jackets, and is basically a chip.
Alaska State Troopers Aircraft Section Goes Operational With RECCO SAR Helicopter Detector
www.snowindustrynews.com
From this article, it looks as though they are now using RECCO to hunt for missing adventurers no matter the season. The KEY, though, is that there has to be a receiver (RECCO chip) on the missing person. I don't see anything to indicate in this case that there is a RECCO chip on the missing hunter.
Then, you need a specially equipped helicopter. Most of the time, these will be focused at outdoor areas with high visitation because that's where most people go missing. The Arctic tundra? Highly unlikely.
If you'd like to learn more, RECCO has a website, and REI has an article on what this looks like in the field.
IMO RECCO is not a factor in the SK case.
For RECCO to be useful in any case, you'd have to be thinking ahead to the idea that you could get lost. You'd have to recognize the risks that you're heading into and plan accordingly. This is called risk mitigation. The 10 Essentials are "risk mitigation", as is the RECCO system, but you gotta have them with you.