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I'm unfamiliar with that region, but I know here in Canterbury almost all repeater sites have various repeaters for different businesses etc. here in chch you can pay a monthly subscription fee to...

Correct. Department of corrections use Motorola DMR radios on their own encrypted repeaters with GPS system and panic/man down buttons on them.
Not a cheap set up! The forestry down here have moved...

I believe it is AREC (amatuer radio emergency communication) who manage SAR comms. They most likely are using Tait radios.

It doesn't matter which brand you buy, they will all be limited to line of site using a simplex channel. I have high powered setup in my truck (licensed) and it doesn't do well with a hill or...