If any one educated or expierenced has continued to read through all this junk, I have a question about what use avy beacons would have for something like this. I know that they are different from both MLUs and PLBs but it seems like they could be useful. They are small, light and relatively inexpensive. While they might not be strong enough for a helo to pick the signal up, at least ground searchers could pick up the signal instead of walking over a snow cave without noticing it. Just a thought.