“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.
It continues to be completely revised every year with ongoing care and attention given to its preparation. Sailors will find a wealth of detailed information, including; Buoyancy, Distance Tables, Marine Safety, Navigation, Stability, Tide Tables for World Ports and Time Zones. This list is by no means exhaustive, and sailors will find a host of useful information throughout the book.
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.