Author: The Royal Navy
This new edition of a well-known textbook dating back 100 years is the result of a major overhaul to bring it fully into the digital age. In the work, electronic systems are now assumed to be the default means of navigation for commercial and military vessels, and paper charts are secondary.
A comprehensive reference lays the foundation for safe and effective navigation at sea, including ocean and coastal passages, pilotage and anchoring. The fundamental principles of navigation developed over centuries of experience in the Royal navy have been applied to the ECDIS era so that this new edition is 'digital by default'. The manual also contains essential guidance on techniques for navigating with traditional paper charts and for the operation of ships when GPS is not available.
- Astro Navigation theory
- Use of UKHO's NavPac 4 calculation software
- Programmable calculator methods
- Practical use of the marine sextant
Satellite technology enables almost every mariner to use electronic navaids to fix their position on the oceans, However, electronic systems can be disrupted by errors in a satellite or its ground control systems, defects in shipboard equipment or interference with satellite signals. The celestial chart therefore remains the most reliable tool for mariners navigating out of sight of land.
This new edition of the classic guide to celestial navigation has been redesigned for clarity and contains guidance on using UKHO/Nautical Almanac Office's NavPac 4 software for astro navigation, including full-colour screenshots. With NavPac, a modicum of skill with a sextant and the appropriate chapter from the book, anyone can do astro.