The skeg's purpose and flat underbody is to stop the cross-flow of air under the hull

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The skeg's purpose and flat underbody is to stop the cross-flow of air under the hull

© Sam Thom / America's Cup

The skeg's purpose and flat underbody is to stop the cross-flow of air under the hull photo copyright Sam Thom / America's Cup taken at Royal New Zealand Yacht Squadron and featuring the AC75 class

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