Post em here....I'll start with this one
South from Zenith Noon
You'll need to build a sunrise/sunset table first, and from this it's easy to plot a series of zenith noons over a period of time. Zenith noon provides the traveller with a solid due south. (you'll need to work in 24 hour time (much better then am's and pm's) to make this work...)
Here's how it's done. Let's say sunrise is at 0723, and sunset occurs at 1703. First add - 0723+1703 = 2436 then average - 2436/2 = 1218
Zenith noon occurs at 12:18
Besides knowing south, it makes it possible to determine declination in the field when working map and compass...
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