Digital sextant for ship and positioning calculation method using digital sextant

摘要

A digital sextant for ships and a digital sextant for ships that allows the ship''s position to be quickly and accurately calculated using the elevation angle of the celestial body in a state where the GPS is broken or cannot be used due to jamming during a ship sailing in the ocean. Regarding the location calculation method used, an analog sextant that measures the altitude of a celestial body in response to a user''s manipulation, an encoder that converts the altitude angle measured by the analog sextant into a digital signal, and a ephemeris database that provides ephemeris data , Including a digital altitude signal converted by an encoder and a position indicator that displays ship position information calculated by a celestial-based ship level calculator and a celestial-based ship level calculator that calculates the ship level using the ephemeris data, Implement.