The Air Almanac 2018 provides essential astronomical data for celestial navigation. This annual publication serves as a critical resource for pilots and navigators, offering detailed information to chart courses using celestial bodies. It includes daily tables for sunrise, sunset, and twilight, along with sky diagrams and lunar rise/set times for various latitudes. The Almanac also precisely lists the positions of navigational stars and the Greenwich hour angle and declination of the Sun, Moon, and planets, all tabulated at 10-minute intervals for comprehensive daily planning.

The Air Almanac is a long-standing, authoritative reference for celestial navigation, relied upon by aviators and mariners for its accuracy and comprehensiveness. Its annual publication ensures that users have access to the most current astronomical data required for plotting courses. The detailed tables and diagrams provide the necessary information for precise calculations, making it an indispensable tool for anyone engaged in celestial navigation. This edition continues that tradition, offering a full year of data in a readily accessible format.