Method for measuring track deviation of ship's great-circle navigation

Abstract

The invention discloses a method for measuring the track deviation of a ship's great-circle navigation method. The method is divided into five steps: calculating the shortest distance between two points on the desired route; calculating the shortest distance between the starting point and the current position; Reference point; calculation of auxiliary correction deviation angle; calculation of track deviation. The present invention uses the method of taking reference points on the planned route to obtain the track deviation, which is beneficial to the rapid correction of the course of the ship and truly shortens the voyage time; the application of the measurement method of the track deviation can calculate the navigation time of the great circle navigation method in real time and accurately. Track deviation is beneficial to improve the accuracy of ship track control, and guide the completion of the entire voyage with a more economical and reliable navigation route, so as to achieve the purpose of energy saving and emission reduction.

Description

technical field [0001] The invention belongs to the technical field of ship track and course control, and particularly relates to a method for measuring the deviation of a ship's great circle navigation track. Background technique [0002] With the gradual commercialization of the GPS positioning system, the track control is gradually realized in the autopilot. If the ship can always approach the desired route during the navigation process, it can not only reduce the track deviation and improve the navigation efficiency, but also save fuel, low carbon and environmental protection. [0003] The traditional method of obtaining the track deviation of the great circle method generally adopts the segmentation method, that is, after dividing the great circle route into several sections, each section is approximately regarded as an equal course line, and then the geometric relationship is used to solve the track deviation; this method is relatively rough in calculation. , the calc...

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Problems solved by technology

[0003] The traditional method of calculating the track deviation of the great circle navigation method generally adopts a segmented method, that is, after the great circle route is divided into several segments, each segment is approximately regarded as an equal course line, and then the geometric relationship is used to solve the track deviation; the calculation of this method is relatively rough , the calculation accuracy has a strong dependence on the number of segments, and the more the number of segments, the higher the accuracy; however, there is no uniform standard for the selection of the number of segments, which generally depends on empirical selection, and there is a gap when the sailing distance is long. big error

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