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In episode three of the Practical Celestial Navigation course, Andy Howe examines the theory behind celestial navigation, the celestial triangle and the celestial sphere, and why it is important to have a basic understanding of each. Topics introduced include zenith position, declination, GHA, LHA, Azimuth Angle, assumed position, and sextant altitude.
January 2022
Lydia Mullan is the editor-in-chief of SAIL magazine. She was named the 2025 Young Journalist of the Year by the Yachting Journalist Association and has been recognized as the marine industry's best adventure writer by Boating Writers International three consecutive years (2023-2025). In her eight years with SAIL, she has published over 500 articles and worked on nearly 100 issues of the magazine. Mullan was also the race commentator for the 2025 Transpac and 2025 Marblehead-Halifax races, a 2024 Magenta Project graduate, and the media manager for Cole Brauer’s viral circumnavigation.
![Photo from Library of Congress, Prints & Photographs Division, photograph by Bernard Gotfryd, [Reproduction number e.g., LC-USZ62-12345]](https://s3.amazonaws.com/media.sailmagazine.com/wp-content/uploads/2026/05/06145433/Ted_Turner_April_1985-Bernard-Gotfryd-2048x.jpg?w=768 "Ted_Turner_April_1985-Bernard-Gotfryd-2048x")
