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USS Advocate was a fishing sloop of the United States Navy. She was captured after flying a Confederate flag in Mississippi Sound by the screw steamer USS New London on 1 December 1861. She was purchased by the US Navy to be sunk as a blockship at Ship Island but was apparently sunk as an obstruction in Petit Bois Channel, Alabama instead.

References

This article incorporates text from the public domain Dictionary of American Naval Fighting Ships.