Map tiles need a live connection; the plotted lines/fix still work offline
(just without the background map).
Sight-reduction worksheet (selected sight)
Plot this sight
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Prefilled with the current simulated reading (using the corrections set above) — edit this if you have a real sextant observation instead.
Prefilled as a real Assumed Position: Lat rounded to a whole degree, Lon chosen so LHA comes out to a whole degree — matches how Sight Reduction Tables are actually used.
Sextant Simulator
What you see through the eyepiece, and how the instrument works from the side
Mirror type
Drag up/down in the eyepiece (or scroll) to adjust the index arm (Hs) - hold Shift while scrolling for bigger steps.
A body's reflected image only shows up once you're roughly at the right height.