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This article is an excerpt from NauticEd’s online Skipper Large Keelboats Course, a comprehensive online sailing course for beginner to intermediate sailors to learn how to sail large sailboats 26 ft (8m) and above. The Skipper Large Keelboats course is part of the Skipper Course Bundle of online courses, also teaching you how to master maneuvering under power and docking!

You can learn to sail and improve your sailing with NauticEd, the international leader in sailing education.

The Wind Triangle: Apparent Wind vs True Wind

Apparent wind is a vector summation of the boat velocity and the true wind velocity. The animation we have included below shows how the apparent wind changes with boat angle to the wind, given no change in boat speed and true wind velocity.

Sailing concepts like this are discussed in depth in our NauticEd Skipper Course. Make sure to check them out for yourself should you like to learn even more concepts like the one we have discussed today.

To properly utilize the animation below, simply click on the various points of sail buttons and the Animate button.

You can learn more in the Skipper Course....

Knowledge and theory for longer distances and overnight sailing in diverse conditions. The Skipper Course is a comprehensive online sailing course for beginner to intermediate sailors wanting to learn how to sail larger sailboats 26ft to 56ft. Or upgrade to the Skipper Course Bundle of online courses to also master maneuvering under power and docking!

Author

  • Grant Headifen

    Grant Headifen is a USCG-certified Master Mariner (50-Ton), founder of NauticEd, and one of the sailing world's most recognized educators. With 46 years on the water, charters across 40+ global destinations, 5 sailing books, 30+ online courses, and 300,000+ students worldwide, Grant brings real-world expertise to every article. He pioneered fractional boat ownership through SailTime and serves on the Texas Boater Safety Advisory Board. NauticEd is the only U.S. sailing education body recognized by the U.S. Coast Guard under American National Standards.

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Last updated on June 24th, 2025