The Nautical Almanac (NP314)

Overview

Contains astronomical information to support bridge crews in routine and emergency celestial navigation, as well as the calculation of daylight hours and mandatory gyro checks.

The Nautical Almanac (NP314)

The Nautical Almanac is carried on every ship within the Royal Navy and on many sea-going vessels around the world. It is at the core of celestial navigational training courses worldwide. Carriage of the Nautical Almanac is required in either paper or digital format, under Regulation 19.2.1.4 of SOLAS Chapter V.

This annual publication includes:

Tabulations of the Sun, Moon, navigational planets and stars to help determine positions at sea when using a sextant
Times of sunrise, sunset, twilights, moonrise and moonset, calendarial information, phases of the Moon and eclipses of the Sun and Moon to help bridge crews plan observations
Interpolation and altitude correction tables, pole star tables and diagrams, and notes for the identification of stars and planets
Information on standard times for countries around the world
A concise set of sight reduction tables and sight reduction forms
A six-page supplement of polar astronomical phenomena including semi durations of sunlight, civil twilight and moonlight included in the publication at the request of the Royal Navy.

This is a joint publication with the United States Naval Observatory.

Also available as an ADMIRALTY e-Nautical Publication

In addition to paper format, the ADMIRALTY Nautical Almanac is available as an ADMIRALTY e-Nautical Publication (AENP). AENPs bring improved efficiency, accuracy and access to information bridge crews need through electronic NM updates and simple search functionality.

Find out more about AENPs

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Celestial navigational software to enable rapid and accurate positioning at sea.

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The Nautical Almanac (NP314)

Contains astronomical information to support bridge crews in routine and emergency celestial navigation, as well as the calculation of daylight hours and mandatory gyro checks.