The Nautical Almanac 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. It is carried on every ship within the Royal Navy and is at the core of celestial navigational training courses worldwide.

Now available

New edition - August 2024

Revised Edition 2024

This unique survival at sea handbook helps you ensure your crew's survival in a liferaft. Buy it, build your own grab bag and be sure to be prepared!

“A seaman always knows his latitude” is an ancient proverb which emphasises the importance attached to knowledge of the ship's latitude. Hansen’s Ex-Meridian Tables, first published in 1919, have for over a century proven to be essential for mariners to calculate their position on Earth.