Re: Oh dear oh dear
..but if you don't have the book, then you don't have the celestial body position data so you can do all the spherical trig you like, you'll be missing a third of the data you need to calculate your position line.
Since you need the almanac data somewhere, why not include the sight reduction cheat-sheets in the same volume?
I suppose you can get an approximate fix from a noon-sight of the sun provided you've got a reliable timepiece. That'd be good enough for trans-oceanic intercontinental nav, but good luck if you're aiming for a fly-turd speck of an island somewhere. You're gonna need a taller lookout mast.