Tuesday, December 30, 2008

How to Determine your Latitude by Local Apparent Noon (LAN)

The objective of this is to define how to compute a latitude line by using the sun at Local Apparent Noon (LAN).
Since the latitude of a position may be determined by finding the distance between the equinoctial and the zenith, you only need to know the declination and zenith distance (coaltitude) of a body to determine latitude. This has been used by mariners for centuries because of it's simplicity.