I’m working in a mountainous region, about 12k ft, mountains are about 14k ft. Dense forest, winter only in untouched snow, no roads, no way out except by ski so it needs to be able to reach an emergency channel at least 5 miles deep. It’s gotta work. I’m talking serious life safety. What’s your recommendation?
PLB or Sat phone. Too many unknown variables with a blanket requirement in the mountains as operator skill and licensing becomes a large factor.
I agree. Without knowing the specific details, including the country, mountain region and availability of repeater systems, it is difficult to recommend any specific radios, because from your general description, any terrestrial based radio is going to have performance issues across an entire mountain range.