The product is a bundle of three Nautical Almanac books for the years 1978, 1983, and 1990.

Published by Her Majesty's Stationary Office/US Government Printing Office, these almanacs are authored by H.M. Nautical Almanac Office.

Each book contains 314 pages of reference material in English, focusing on maritime navigation and related information. These advanced level almanacs provide valuable resources for those interested in navigating the high seas.