The USS Nyack was a wooden-hulled screw gunboat constructed at the New York Navy Yard, with her keel laid on March 25, 1863. She measured approximately 180 feet (55 meters) in length, with a beam of 29 feet 8 inches (9.04 meters) and a draft of 11 feet 6 inches (3.51 meters) when fully loaded. Her hull had a depth of hold of 12 feet 3 inches (3.73 meters) and a capacity of 593 tons burden. Powered by machinery designed by the Bureau of Steam Engineering under Benjamin Isherwood and built by South Brooklyn Iron Works, Nyack was equipped with two coal-fired boilers driving two steam engines, each with a single cylinder measuring 30 inches in diameter and a 21-inch stroke. This propulsion system propelled her to a maximum speed of about 10 knots, and she had a single screw propeller. Her armament initially included a variety of artillery, such as 100-pounder and 30-pounder Parrott rifles, two 9-inch Dahlgren smoothbore guns, two 24-pounder guns, a 12-pounder, and a 12-pounder heavy rifle. Her armament was modified several times during her service. Commissioned on September 28, 1864, under Lieutenant Commander L. Howard Newman, Nyack served during the American Civil War, primarily in the North Atlantic Blockading Squadron. She participated in the blockade and took part in the first assault on Fort Fisher in December 1864, providing artillery support and anchoring close to the beach to assist landing troops. During the second assault in January 1865, she remained near the "Old Inlet," observing the battle from a distance. She also participated in the bombardment of Fort Anderson in February 1865, leading to its surrender. Following the war, Nyack was transferred to the Pacific Squadron, departing New York on July 22, 1865. Over the next several years, she cruised along the coasts of Panama, Ecuador, Peru, and Chile, safeguarding American interests and providing aid, such as assisting the Peruvian Navy and evacuating political refugees during upheavals in South America. She also conducted surveying operations, including work in the Galápagos Islands and the Darien region of Panama. By 1870, her boilers had become severely damaged, and after a series of command changes and repairs, she was unable to continue active service. In January 1871, she aided in rescuing the crew of the wrecked USS Saginaw. Her deteriorating condition led to her decommissioning on March 15, 1871, and she was eventually sold in 1883 for $6,500. The vessel was then broken up at Cresham's Point in December 1883, marking the end of her maritime service.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.