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History of the sextant 10/29/2024 13:49:10The survey sextant outside the Netherlands 10/29/2024 13:45:42Survey sextants in the Netherlands 10/29/2024 13:42:13Posted by Huibert-Jan Lekkerkerk Home , Instruments Comments 0 views 76The history of the sextant and octant started in the 17th century and was developed from instruments such as the cross-staff and the Davis quadrant or backstaff. The sextant uses a double reflection for measuring angles.Posted by Huibert-Jan Lekkerkerk Home , Instruments Comments 0 views 42The survey sextant is an adaptation from the nautical sextant specifically geared towards measuring horizontal angles rather than astronomical bodies. It generally lacks the filters and has additional legs for sitting it upside down.Posted by Huibert-Jan Lekkerkerk Home , Instruments Comments 0 views 53In the Netherlands survey sextants from both Dutch makers as well as foreign sextants were used in surveying with the Dutch government and Dredging companies.Posted by Huibert-Jan Lekkerkerk Home , Instruments Comments 0 views 52The station pointer is used to plot a position using the Snellius method, that is by using two angles between three or four points.
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