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==Expedition item== | |||
===[[Gergana]] – ''"Brass Sextant"''=== | |||
The Sextant has been used to measure the angle between any two visible objects. It is an important part of celestial navigation( sailing). The angle and the time when it was measured, can be used to calculate a position line on a nautical point. Around 1750 the Sextant ( and Octant) became the main instrument for navigation. | |||
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[[File:Brass Sextant.jpg]] | |||
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