sextant

Spyglass for iPhone or iPod touch. This is pretty close to what I am looking for, but I'd rather it ran on Android OS. Think about it: modern smartphones have everything you need for a sextant. The electronic compass and accelerometer provide orientation and artificial horizon...

It is time to re-learn how to use a sextant. Having only spent an afternoon with a sextant and some hands on training 40 years ago I'm basically completely ignorant. I guess good books on the topic wouldn't be a bad idea either. What sextant should we be looking at if we want to use the...