February 24, 2000.
Subscription service consists of a basic manual and changes for an indeterminate period.
Issued in looseleaf form. Provides astronomical data for air navigation. Contains ephemeral data for the year, together with auxiliary tables and graphs, and a brief explanation of the use of the volume. Presents data for the Sun, Moon, Aries, planets, and stars. Prepared jointly by her Majesty's Nautical Office, Royal Greenwich Observatory and the United States Naval Observatory.