Henning Umland's CelNav site preserves a compact guide to celestial navigation with tutorials, freeware, links, and a homepage whose visitor counter dates back to May 1997.
https://switchboardtechservices.com/articles/ancient-web-celnav-kept-celestial-navigation-practical-on-the-web/
By Switchboard Tech Services · Originally published 2026-09-10
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https://switchboardtechservices.com/articles/ancient-web-celnav-kept-celestial-navigation-practical-on-the-web/
By Switchboard Tech Services · Originally published 2026-09-10
#Switchboard #Article
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