Document Type : Original Manuscript
Authors
1 Department of Meteorology and Oceanography, Imam Khomeini University of Marine Sciences, Nowshahr, Iran.
2 Department of Special Operations and Coast reconnaissance, Imam Khomeini University of Marine Sciences, Nowshahr, Iran.
3 Department of Atmospheric and Oceanographic Sciences, Faculty of Marine Science and Technologies, Hormozgan University, Bandar Abbas, Iran.
4 lecturer at Imam Khomeini University of Marine Sciences, Nowshahr, Iran.
Abstract
The great circle is of special importance as the shortest distance between two points in navigation. Navigating officers must always be able to calculate the path of the great circle and the turning points on that path. One of the drawbacks of calculations in the path of the great circle is the large volume of calculations and the uncertainty of the correct result. In this research, using the method of composite triangles, the path of the great circle is solved and two general methods for calculating the rotation points of the great circle, which include a) calculating the rotation point with equal longitude difference and b) calculating the rotation point with distance difference equal is used. Next, using the method of equal longitude difference in calculating the points of rotation, a fast and reliable relationship has been developed to calculate the points of rotation. The premise of the developed method is that the point of rotation is always equal to the difference in longitude between the origin and destination. The developed method can calculate the width of the turning point only by calculating 5 sentences from Norris book.
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