USS Alert (1861)
USS Alert (1861) was a 90 long tons (91 t) steamship named A. C. Powell purchased by the Union Navy during the first year of the American Civil War.
A. C. Powell — later renamed Alert, and still later renamed Watch — served primarily as a tugboat, but at times she performed duty as a dispatch boat, ship’s tender, and even as a gunboat despite the fact that she had on board only a howitzer instead of a cannon or rifle.
Read more about USS Alert (1861): Built in New York in 1861, Post-war Decommissioning and Subsequent Career