NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Jacquelin Hardy
Date: 2026 Aug 4, 08:25 -0700
Thank you Mr Reed,
I used the ABC Tables , in Nories during my seatime years, some 50 years ago. Then I found the existence of British Admiralty Chart No. 5000, a real British way of solving a problem.
Then, when came the first calculator with trig functions, I entered the formulas , "standard spherical law of cosines written in a calculator-friendly clean format", just as you said.
Then came the first computers (TRS-80). I wrote an assembler code for a Line drawing, the word "Line" wasn't part of the Basic language.
The I wrote a small sofware do draw a fix with 3 or 5 intercept lines, with the data entered by the user.
But I couldn't bring my TRS-80 onboard the ship. Too big.
You feed me with astronavigation and software writing (amateur) and I am good for a looonnng way.
I will have a question about Long Term Almanac later on.
Regards
Jacquelin Hardy
