9月21日的Nautical Almanac应用程序分析

Nautical almanac – calculates azimuth, height and other celestial almanac information for Sun and Moon, primary navigation stars and navigation planets: Venus, Mars, Jupiter, Saturn. In addition, for magnetic compass error calculation, finds Variation (Mag. Declination) for given positon. Calculation of variation is based on the latest World Magnetic Model. Gyro and magnetic compass error calculator.