The Nautical Almanac 2021

Tabular positions of the sun, moon navigational planets and stars for use in the determination of position at sea from sextant observations for the year 2021. Times of sunrise, sunset, twilights, moonrise and moonset, phases of the moon and eclipses of the Sun and Moon. Interpolation and altitude correction tables, pole star tables and diagrams and notes for star and planet recognition. Standard times for most countries and the world are given. A concise set of sight reduction tables and sight reduction forms are also included. 

The Nautical Almanac 2021