HTTPS://SAILINGALMANAC.COM/ FUNDAMENTALS EXPLAINED

The guide is made up of the subsequent details tabulated at hourly intervals to the precision of 0.1 arcminute: the Greenwich hour angle and declination in the Sunshine, Moon, and navigational planets; the Greenwich hour angle of Aries; positions of the navigational stars; rise and set periods of the Sunlight and Moon for A selection of latitudes;