The RYA Astro Navigation Handbook is the perfect guide for anyone new to celestial navigation or looking to refresh and update their astro-navigation skills. Designed to be clear, practical, and accessible, it isn’t a dense textbook—it's a user-friendly companion that helps you “just get on and do it.”This handbook is the official course book for the RYA Yachtmaster Ocean Theory Course, making it an essential resource for students and ocean sailors alike. Inside, readers will find straightforward explanations and guidance on key astro-navigation topics, including:The sextantThe celestial sphereThe noon sightMorning and afternoon sightsPlanetsPolarisWhether you're preparing for an ocean passage or simply expanding your navigational knowledge, this book provides the confidence and clarity you need to navigate by the stars.