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== Summary ==
Because they have a smaller footprint, vertical-axis wind turbines (VAWT) are better suited to boats than horizontal -axis wind turbines(HAWT). They are somewhat less efficient but can take advantage of turbulent and gusty winds. Cost performance and size remain barriers. Small turbines around 600 W capacity cost USD $5,000 or more and have a spinning diameter around 2 m.
== Vertical Axis Wind Turbines ==
