Description
Nautical Almanac 2027 – Commercial Edition provides astronomical data for celestial navigation throughout the 2027 calendar year. Published by Paradise Cay Publications (Paracay), this English-language edition uses data prepared jointly by the U.S. Naval Observatory and His Majesty’s Nautical Almanac Office. It is a practical reference for navigators, offshore sailors and students learning to determine their position from celestial observations.
The almanac provides hourly values of Greenwich Hour Angle (GHA) and declination for the Sun, Moon and navigational planets, together with data for Aries and selected navigational stars. These values are used with the time of observation and sextant altitude measurements to calculate lines of position and establish a vessel’s position.
It also includes sunrise, sunset, moonrise and moonset tables, phases of the Moon and other astronomical information. Interpolation tables, altitude corrections and Polaris tables support the calculation process. Time zone information, sight reduction tables and working forms are included to help with the practical use of celestial observations.
Celestial navigation depends on accurate observations and data for the correct year. Use the almanac with a sextant, an accurate time source and a suitable sight reduction method. It is useful both for navigation courses and as an onboard reference for sailors who want to practise and maintain their celestial navigation skills.
This volume contains data for 2027. It is an English-language paperback measuring 7 × 10 inches, approximately 17.8 × 25.4 cm. Publisher: Paradise Cay Publications. ISBN: 9781965876121.
