ASA 107, Celestial Navigation | Modern Sailing

ASA 107, Celestial Navigation

6 evenings, Tues / Wed / Thurs

Since ancient times, human beings have looked to the heavens to find our way around on Earth. It was only a few hundred years ago that we developed systems to plot latitude and longitude fixes based on the positions of celestial bodies, and the common practice of celestial navigation by means of a sextant emerged. The basic premise of celestial navigation relies on calculating angles between the observer, the horizon, and a predictable celestial body such as the sun, moon, or visible planets and stars.

In the modern age, we’ve become dependent on highly precise and user-friendly navigation technology – but technology can fail – and then what? For safety and self-sufficiency, celestial navigation remains an essential skill for every ocean-going mariner.

With the ASA 107 course, you will learn to:

  • apply celestial navigation theory and practices for safe navigation of a sailing vessel in offshore waters;
  • use the sextant to determine your vessel position by the Local Apparent Noon method; and
  • deduce your location with sun, moon, planet and star lines of position and fixes.

Your Celestial Navigation textbook, Star Finder Book, and Nautical Almanac Commercial Edition are included with the purchase of your course and will be mailed to you. If you prefer to pick up your course materials in person or if you signed up less than a week from the first day of your course, please contact our office. Advance study of these books will enhance your success in this course.

If you have ever dreamed of sailing over the horizon, take ASA 107, Celestial Navigation with Modern Sailing School & Club. Have confidence that no matter how far from shore you sail, you will always be able to find your way.

Cost for Members: 
$645
Cost for Non Members: 
$845
Prerequisites: 
ASA 104, Bareboat Cruising ASA 105, Coastal Navigation

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  • John Clark

    Every aspect of Modern Sailing - training, syllabus, course materials, quality of the boats, quality of the instructors, and the very friendly and helpful staff - exceeded my expectations. Modern Sailing has a first class sailing program in an environment with challenging winds and currents. I look forward to coming back to charter a boat and certainly plan to continue my sailing training.

  • Guy Robinson, Member

    I started sailing at Modern at the end of 2021 and threw myself into it, spending as much time out on the water as I could. I came to Modern with some flat water dinghy sailing experience and it was quite a transition learning to sail bigger boats in much tougher conditions. There was a lot to learn, but the Modern instructors, Club Skippers and fellow Modern sailors made learning fun and rewarding. My Modern instructors were clearly very experienced sailors and sailing with them was inspiring! I want to thank the maintenance crew and office staff for their dedication and hard work - you are the folks who make things work! There is a lot more to learn and I look forward to sailing with Modern for years to come.

    Guy Robinson
  • Ray Arceneaux

    The vessel was clean and in fine condition - very nice boat for training, well-equipped.

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Modern Sailing School & Club

Sausalito Location
2310 Marinship Way, Sausalito, CA 94965
(415) 331-8250
(800) 995-1668

Berkeley Location
1 Spinnaker Way, Berkeley, CA 94710
(415) 331-8250
(800) 995-1668

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