AstroNavigation – A free course
Anybody know where to buy a good sextant? (I hope the course discusses this; I haven't had time to read it yet.) I started trying to learn this stuff a few months ago and it seems that most available sextants fall into two categories: Cheap plastic ones with poor thermal characteristics that make them inaccurate, and expensive brass ones that are more thermally stable but designed for display and not calibrated for serious navigation. I'd like to buy one in between: A quality navigational instrument that doesn't have to be "pretty".