Hemisferium Nautical Astrolabe 10 øThe nautical astrolabe is a simplification of the planispherical or astronomical astrolabe and its fundamental purpose is to determine the latitude of a ship by observing the altitude of the sun or other stars such as the Pole Star. The nautical astrolabe has a much heavier design than a typical astrolabe of the time to survive the rough sea conditions and compensate for the movement of the ship. This instrument is a reproduction of the Nautical
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