Ex-Meridian Short Table

This Ex-Meridian short table can be used with a pocket trig calculator or slide rule to obtain an accurate latitude. Add the correction to a bodies altitude that is near meridianal passage (MP) and then solve for latitude as if observed exactly on the meridian. +XM' = minutes of arc to add to observation Ho. t = meridian angle L = latitude d = declination Ho = corrected observed altitude

Weather Proof Custom References and Trig Tables

An alternative to lamination for weatherproofing useful tables and references is to use three ring sheet protectors with a 1/2 inch binder. Pages are very easy to handle.