Aiyo, oxygen planning is everything up there! We calculate flow rates and bottle capacity so we have enough to summit *and* get back down to our last cache. If it runs out too early, your thinking slows to a crawl and you become a danger to everyone—you have to turn around immediately, no arguments.
I've seen a teammate's lips turn blue at Camp Four because he miscalculated; now I check my own gauges, *hoye*.
#mountaineering#himalaya
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