Mirror Sextant. A Doubly Reflecting Navigation Instrument Used To Measure The A ...
Stockphoto ID: 3732344
File name: 346475.jpg
Format: digital, 6000+ pixels longest side
Property release: no Model release: no
Source: photo agency Based in: United Kingdom
Description: Mirror sextant. A doubly reflecting navigation instrument used to measure the angle between any two visible objects. Primary use of a sextant is to determine the angle between an astronomical object and the horizon for the purposes of celestial navigation.
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