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recasfoin

recasfoin on Hacker News

Re:How to Use a Watch as a Compass on Thursday October 20, 2022 @01:34PM (#33277991)
If it's summer solstice and you're on the equator and it's noon, then the accuracy is bad. Otherwise, YMMV -- (literally!)

https://academic.oup.com/astrogeo/article/52/3/3.12/187095