“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.
This book starts with a basic description of the workings of modern radars with a level of technological detail sufficient for deck officers of all grades. While the technology is changing rapidly the book, while briefly referring to the history of the development of radar, concentrates on the equipment to be found in a modern bridge suite. This includes the setting up, adjustments and controls of the radar receiver and also the plotting computer (ARPA).