based on my short ish 2-3 day trips i use nztopo or the like on my phone screen that is large enough that i can read it. put it in flight mode and only turn it on intermitantly as most phones only last 8-12 hr of gps on a good day.
l use my garmin watch for basic minute by minute navigation and compass etc. however i find the screen too small for the mapping to be much use even if i get my glasses out. Without the watch i would be back to hanging a compass around my neck.
then i carry s little PLB for those oh shit times and just hope its for someone else.
Ps, you probably know this from your army time but i had a ex army guide point out to me how useless a plb is in you pack if are 20mtr from it and have an accident or slide. always on your person.
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