Two faces of a circular slide rule, one with logarithmic spirals and one with haversine spirals

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   Trammell Hudson (th@social.v.st)'s status on Wednesday, 07-Jan-2026 08:09:06 JST Trammell Hudson

   Now that y'all know the basics of celestial navigation, how about trying my latest printable slide rule to calculate the Computed Height of a star given your latitude, the star's declination, and the hour angle between your positions? https://trmm.net/navwheel/