USS Delta (1864)

USS Delta (1864) was a steamship 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.

Service as a tugboat during the American Civil War
Delta — a steam tugboat — was purchased as Linda at Philadelphia, Pennsylvania, 3 June 1864, and renamed Delta on 27 November. She was also known as Tug No. 4. Delta was sent to Hampton Roads, Virginia, to be fitted as a torpedo (mine) tug, and operated in the James River under the command of Acting Master's Mate W. F. Gragg until 28 March 1865.

She was transferred to the sounds of North Carolina for duty, and for a short time in April 1865 was placed at the disposal of the Union Army with four other torpedo tugs.

Delta was sent to New York at the close of the war and sold there on 5 September.