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I’ve never met a single hiker who could easily navigate with map and compass in low visibility. I mean, how do you think you’re doing to do it if you can barely see your hand in front of your face? Navigating via map is ok if you have good visibility and can pick out landmarks. If you have a compass and can at least see some of the surrounding terrain a short distance away, you can maybe do it. But, as others pointed out, stick yourself on a mountain with no well worn tourist trail and low visibility and a compass won’t save you. It’s mostly trial and error at that point.

As my partner put it when discussing a group of fell runners - they all talk about navigating via compass, but in reality they just use gps all the time.

Until fairly recently I navigated entirely by map. The maps in the U.K. are slightly inaccurate despite their reputation, so even on a good day I’d make small mistakes. I switched to a phone map so I didn’t have to carry a big cumbersome physical map with me, and then I realised the value of gps. I’ve hiked in low visibility since when I would have definitely have gotten lost without gps - a gazillion criss crossing trails, high erosion, long flat featureless moorland with no landmarks whatsoever… challenging on a good day.