This document is about the Yachtmaster Ocean Study Guide, which introduces the prerequisites, examination procedures and examination contents of the Yachtmaster Ocean Study Guide.
This two-page study guide from South African Sailing (Draft 1, dated 20 November 2022) explains what the Yachtmaster Ocean qualification involves. It notes that a Yachtmaster Offshore CoC already entitles a sailor to cross an ocean, and that the Ocean qualification is kept for those who want to learn how to fix their position in mid ocean as was done before GPS.
The guide lists the prerequisites (a South African Sailing Yachtmaster Offshore qualification, an eye test with colour vision, and a South African SRC Radio Operator's Certificate or a higher GMDSS certificate such as the LRC or GOC), describes the two-part examination, names the sight reduction tables and nautical almanac used in the chartwork exam, and gives the tasks the chartwork paper might involve. It closes with a short list of celestial navigation books for self-study and is signed by Jan Hofmeyr, SA Sailing National Senior Examiner, and Russell Sher, SA Sailing WC Regional Senior Examiner.
A South African Sailing Yachtmaster Offshore qualification, an eye test (colour vision is required), and a South African SRC Radio Operator's Certificate or a higher level GMDSS certificate such as the LRC or GOC.
Two separate exams: a practical exam in which you demonstrate the use of a sextant and sextant corrections, and a written chartwork exam.
Sight Reduction Tables for Air Navigation — Selected Stars Publication 249 Volume 1, Publication 249 Volume 2 (latitudes 0° to 40°, declinations 0° to 29°), and the Nautical Almanac Commercial Edition.
That you can use a sextant: dropping the sun or another celestial body onto the horizon (or a surrogate horizon), and correcting the sextant for perpendicularity, side error and index error.