NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
A better calculator than a CASIO fx-260 Solar?
From: Tony Oz
Date: 2019 Jun 4, 06:59 -0700
From: Tony Oz
Date: 2019 Jun 4, 06:59 -0700
Hello!
A calculator I finally got on ebay (for a very reasonable price!) - the famous CASIO fx-98. It's solar-only and very tiny.
With Lars's refinement of Robin's recipe for using the arctan2 function, now I can do St-Hilaire like this:
( cos(Lat)·tan(Dec) - sin(Lat)·cos(LHA) ) [inv][R->P] sin(LHA) [=]
Then to save Y value in the memory:
[X<->Y] [inv][X<->M] [X<->Y]
With X value on the screen again, obtain the HC:
arccos(X·cos(Dec))
And the azimuth:
180° [M+] [MR]
I'm really happy! Huge thanks, Lars and Robin!
Unlike the CASIO fx-48 clone I had already, the fx-98 is capable of decimal-to-sexagesimal conversion.
I keep it in a waterproof envelope - it works fine like that too.
Warm regards,
Tony
60°N 30°E
File:
File:
