A tutorial on real navigation?
 

Does anyone know of a short tutorial on real navigation? I tried to find some advice but only found out a Real Navigation Mod that is really old and probably outdated and a couple of threads hundreds of messages long, full of technical issues.

What I am looking for is a SH3 Real Navigation for dummies kind of version, a text file, or a Youtube video instruction. I don't even know how to use the sextant. I understand the sun and the clock don't work properly, but is there a way around this?