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A sextant is used to determine the angle between an astronomical object and the horizon for the purposes of celestial navigation.
Mark 15 Sextant - this model has many great features including seven large sunshades, a 3 mm x 27 mm star scope, and easy-to-read micrometer drum vernier scale that reads to 2/10 of a minute. The Mark 15 has a 7" (18 cm) frame radius graduated from 120 degrees to -5 degrees and comes with a traditional half-silvered mirror.
*Available for sale in the United States and Canada only.
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