Celestial Navigational Astronomy Star Chart

Celestial navigation, also known as astronavigation, is a position fixing technique that has evolved over several thousand years to help sailors cross oceans without having to rely on estimated calculations, or dead reckoning, to know their position. Celestial navigation uses "sights," or angular measurements taken between a celestial body (the sun, the moon, a planet or a star) and the visible horizon. The sun is most commonly used, but navigators can also use the moon, a planet or one of 57 navigational stars whose coordinates are tabulated in the Nautical Almanac and Air Almanacs. Image reproduction rights can be found in the link near the bottom of this description. Sign up to Mr. Rebates for FREE and save 12% on any zazzle order in addition to a $5.00 sign up bonus All Rights Reserved; without: prejudice, recourse or notice (U.C.C. 1-308) Image Reproduction Rights: http://en.wikipedia.org/wiki/File:Navigational-stars-above-30-degrees-north.svg http://en.wikipedia.org/wiki/File:Navigational-stars-below-30-degrees-south.svg http://en.wikipedia.org/wiki/File:Bowditch-equatorial-stars-0-180.svg http://en.wikipedia.org/wiki/File:Bowditch-equatorial-stars-180-360.svg navigation astronomy celestial chart "navigation astronomy" "celestial navigation" astronavigation "astro navigation" chart diagram "astronomy chart" "astronomy diagram" "navigation chart" "navigation diagram" "celestial chart" "celestial diagram" "star chart" "star diagram" "star navigation" space "outer space" cosmology" nautical "nautical navigation"