A similar process can be used in the southern hemisphere to find South. Personally though, I find myself using it surprisingly often when someone gives me directions in cardinal and I want to orient myself.
Just what I was going to say!
It's actually very simple, point the 24 hr hand at the sun and the 12 o'clock index on the main dial will point north. (Convert +/- 1hr for daylight savings as applicable)
It's literally the reason I bought the watch. I already had Lorier Hyperion (which I still love) and while its clasp is well designed, the lack of on the fly adjustment means I end up getting frustrated with it. Especially in the winter where I'm constantly going from a cold outside to a warm inside, a tooless microadjust is almost a must for me now.
I use my GMTs all the time while flying. Pair that with a gshock and I've got everything short of manually measuring ground speed with a tachymeter on a chronograph or celestial navigation with an hour angle watch (personal grail).
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