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Boston ASA 105 Coastal Navigation Course




3 Days

About the Course

Prerequisite: ASA 104 - Bareboat Cruising

ASA 105 is a classroom based course that teaches students to apply the navigational theory and practices for safe navigation in coastal and inland waters. We practice charting and passage routing using compasses, parallel rules and dividers. Students learn the intricacies of tides and currents and how to adjust their projected courses to account for these differences. 


Topics Covered in ASA 105 - Coastal Navigation

Dead Reckoning and Estimated Positions

Learn how to apply the fundamental relationship between distance, speed and time in order to find an estimated position or when determining an ETA.

Taking Compass Fixes

Expand on ASA 104's teaching of taking two and three point fixes using a hand bearing compass and how to apply them to a navigational chart.

Calculating Set and Drift

How do we compensate for currents and the side-slipping motion, Leeway, from our own boat when dead reckoning? We teach how to compensate for set and drift so that you can be confident that you will not drift off course planning routes across tidal or current heavy areas.

Taking Running Fixes 

Learn how get a moderately accurate position using a fix off of a single object on the coast, sailing for a length of time and then taking a second fix from the same object. Running fixes are a crucial technique when sailing up and down the coast!

Converting courses and bearings between True, Magnetic and Compass North

We teach how to take a compass bearing, account for deviation and variation and plot it on a navigational chart according to True north.

And more!

We teach far beyond the basic ASA 105 curriculum and cover topics such as tides and currents,

danger bearings, electronic navigation instruments, important navigation publications, and much more!

Students will graduate the course with an American Sailing 105 Coastal Navigation Certification.


Frequently Asked Questions

What is the ASA 105 Certification?

"The ASA 105 certification, also known as Coastal Navigation, is a sailing certification offered by the American Sailing Association (ASA). This certification focuses specifically on the skills and knowledge necessary to navigate a vessel in coastal waters.

The ASA 105 certification is typically obtained by completing a course offered by ASA-affiliated sailing schools or instructors and passing a written examination. It is an intermediate-level certification in the ASA certification series, building upon the foundational skills taught in earlier courses such as ASA 101 (Basic Keelboat Sailing) and ASA 103 (Basic Coastal Cruising)."

How Hard is ASA 105?

The difficulty level of ASA 105, or any sailing certification course, can vary depending on an individual's prior experience, aptitude for learning navigation concepts, and familiarity with the material covered. Generally, ASA 105 is considered an intermediate-level course, meaning it builds upon the basic sailing knowledge acquired in earlier ASA courses such as ASA 101 (Basic Keelboat Sailing) and ASA 103 (Basic Coastal Cruising)

Is ASA 105 Online?

ASA 105 is an American Sailing Association (ASA) certification course specifically focused on Coastal Navigation. It teaches sailors the fundamentals of navigation techniques required for coastal waters. Typically, ASA 105 is not offered fully online due to the practical nature of the skills involved.

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