Originally Posted by
Dougie M
I found that on a trans atlantic yacht voyage that celestial shot precomputation doesn't work. With a marine sextant you take the time of a successful sighting and work the whole thing backwards remembering that "deck height" is a factor and atmospheric refraction is constant. .
Thanks Dougie. I need to find a route burglar who has some forms sculling around in the bottom of an old Nav bag in the loft/garage/cellar* delete as appropriate! Not much call for astro on para wedge or even HALO.
Rgds, VS.