Stark Tables: For Clearing the Lunar Distance and Finding Universal Time by Sextant Observation Including a Convenient Way to Sharpen Celestial Navigation Skills While on Land | Indigo
Understanding Marine Sextant - Principle, Readings and Maintenance
Sextant - Wikipedia
Excerpts from "Celestial Navigation Without Almanacs" by Mark Mason
Illustrations of sextant and other navigational equipment. 'Tables de Navon Pl.11.' Fig.10 to 23 | Royal Museums Greenwich
Celestial Navigation Episode 9: The Sextant - Refraction, Semi-diameter and Parallax - YouTube
Navigational Star Chart
The Demystified Astro Navigation Course – Unit 3 Part 3 | Astro Navigation Demystified