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Tag Archive for: Polar Plot

How do Polar Plots Work on a Sailboat?

November 23, 2022/by Grant Headifen

The polar plot on a sailboat shows the speed the sailboat goes at a specific angle to the wind at a specific wind speed. Read this article to understand how they work and how to read a polar plot.

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Sailboat speed versus sailing angle

September 27, 2017/by Grant Headifen

I nabbed this image off Pinterest via (https://hobiecat16.wordpress.com/2010/09/23/points-of-sail-vs-boat-speed/). It is a pretty good image that represents the speed of a sailboat versus the sailing angle to the wind. It is pretty easy to read – at dead downwind in a 10-knot breeze the fastest you can get this boat to go is slightly less than […]

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What is VMG?

September 5, 2013/by Grant Headifen

VMG – Velocity Made Good and Polar Plots This discussion comes mostly out of our Electronic Navigation Course which is available also as an iPad Electronic Navigation Course App. For sailboats, VMG is slightly different than what you’d expect if you were navigating an airplane or power boat. For airplanes and powerboat VMG is your […]

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How to read a polar plot for sailboats

October 11, 2012/by Grant Headifen

The polar plot is the navigator’s friend. Below is an example for one particular boat for one particular true wind speed.

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