The Air Almanac : 2015
The Air Almanac has the huge information needed for air holy navigation. Guide offers the following information arranged at 10-minute periods to a precision of 1 arcminute: the Greenwich hour angle as well as declination of the Sun, Moon, as well as 3 navigational worlds; the Greenwich hour angle of Aries; increase and set times of the Moon for a variety of latitudes; and various other information. Each version likewise has sky diagrams for each month; dawn, sundown, and also twilight tables; and also positions of the navigational stars. The Air Almanac is readily available nine months before its version date.