Yachtmaster Ocean Theory Online
A course in celestial navigation, worldwide meteorology and voyage planning. The course is suitable for competent navigators planning an ocean passage, or those just interested in offshore navigation techniques.
The Ocean Theory course includes an introduction to the principles of celestial navigation, practical use of the sextant, measurement of time, position fixing by sun and stars, compass checking and great circle sailing. Worldwide meteorology, including tropical revolving storms, and passage planning for ocean voyaging. At the end of the course you will understand the theory of astro navigation, and be able to fix position using sun, moon and star sights.
It is not essential to study before the course, however you may find Celestial Navigation by Tom Cunliffe helpful.
Competent in coastal navigation skills RYA Coastal Skipper / Yachtmaster shorebased certificate recommended.