USS "James L. Davis" (1861) was a bark acquired by the Union Navy during the American Civil War.
 She was used by the Navy to patrol navigable waterways of the Confederacy to prevent the South from trading with other countries.
The Confederate States of America (CSA or C.S.), commonly referred to as the Confederacy, was an unrecognized country in North America that existed from 1861 to 1865.
 The Confederacy was originally formed by seven secessionist slave-holding states – South Carolina, Mississippi, Florida, Alabama, Georgia, Louisiana, and Texas – in the Lower South region of the United States whose regional economy was mostly dependent upon agriculture, particularly cotton, and a plantation system that relied upon the labor of African-American slaves.
USS "Maria A. Wood" (1861) was a schooner acquired by the Union Navy during the American Civil War.
 She was used by the Union Navy as a gunboat to patrol navigable waterways of the Confederacy to prevent the South from trading with other countries.
USS "Orvetta" (1861) was a schooner acquired by the Union Navy during the American Civil War.
 She was used by the Navy to patrol navigable waterways of the Confederacy to prevent the South from trading with other countries.
USS "Dan Smith" (1861) was a schooner used by the Union Navy during the American Civil War.
 She was used by the Navy to patrol navigable waterways of the Confederacy to prevent the South from trading with other countries.
USS "Octorara" (1861) was a steamer acquired by the Union Navy during the American Civil War.
 She was used by the Navy to patrol navigable waterways of the Confederacy to prevent the South from trading with other countries.
USS "Gem of the Sea" (1861) was a bark acquired by the Union Navy during the American Civil War.
 She was used by the Navy to patrol navigable waterways of the Confederacy to prevent the South from trading with other countries.
USS "Oliver H. Lee" (1861) was a schooner acquired by the Union Navy during the American Civil War.
 She was used by the Navy to patrol navigable waterways of the Confederacy to prevent the South from trading with other countries.
USS "Dumbarton" (1861) was a captured steam operated gunboat acquired by the Union Navy from the prize court during the American Civil War.
 She was used by the Navy to patrol navigable waterways of the Confederacy to prevent the South from trading with other countries.
USS "Para" (1861) was a schooner acquired by the Union Navy during the American Civil War.
 She was used by the Navy to patrol navigable waterways of the Confederacy to prevent the South from trading with other countries.

Question: What institution used the Maria A Wook to patrol navigable waterways of the unrecognized country in North American that existed in 1861 to 1865?
Answer: Union Navy