Given the question: Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. USS Whitehall (1850) - USS Whitehall (1850) was a steamer acquired by the Union Navy during the American Civil War. She was assigned blockade duty; however her condition was not always considered seaworthy and she was plagued with condition problems.Whitehall -- a side-wheel gunboat and converted ferry built in 1850 at Brooklyn New York -- was purchased by the Navy there on 10 October 1861 and was commissioned soon thereafter at the New York Navy Yard Acting Master Francis P. Allen in command.
The answer is:
Mean Of Transportation