USS Algonquin, completed as El Toro in 1891 for the Southern Pacific Railroad's Morgan Line, was a small harbor tug commissioned by the United States Navy 2 April 1898. Renamed Accomac, after Accomac, Virginia, June 1898, renamed Nottoway in 1918 and, after the Navy adopted alphanumeric hull numbers on 17 July 1920, classified as YT-18, a district tug. On 5 October 1942 the name was cancelled and the tug was simply YT-18 until 1944 when classification was changed to YTL-18, a little harbor tug. Over the years as a Navy tug, from 1898 to 1946, the tug served from Cuba to Boston.
An auxiliary ship is a naval ship designed to support combatant ships and other naval operations. Auxiliary ships are not primary combatant vessels, though they may have some limited combat capacity, usually for purposes of self-defense.
USS Alloway (YT-170/YTM-170) was an Alloway-class tugboat acquired by the U.S. Navy for the task of providing yard tugboat services during World War II, when U.S. ports were often congested with ships arriving and departing.
Arapaho-class tugboats were oceangoing tugboats designated fleet tugs by the United States Navy during their service in the early half of the 20th century. They were in service during World War I and World War II. Arapaho was built by the Seattle Construction and Drydock Company in Seattle, Washington.
Washtucna (YTB-826) was a United States Navy Natick-class large harbor tug named for Chief Washtucna of the Palus tribe.
USS Evea (YT-458), originally the sixth USS Resolute (YT-458), later YTB-458, was a United States Navy tug in commission from 1943 to 1944.
USNS Narragansett (T-ATF-167) is a Powhatan-class fleet ocean tugboat of the US Navy. She was launched in 1979 and inactivated in 1999, but has since been employed in a number of roles. She is still in service as of 2023 as a training support vessel for Carrier Strike Group 4.
USNS Navajo (T-ATF-169) was a United States Navy Powhatan-class tugboat operated by the Military Sealift Command which was in service from 1980 to 2016. She spent the bulk of her career in the Pacific and is currently moored in Pearl Harbor, awaiting disposal.
USNS Powhatan (T-ATF-166) was the lead ship of the United States Navy Powhatan-class fleet ocean tugboats. She was in service with the U.S. Navy from 1979 to 1999, and then was leased to a private towing and salvage company. At the end of the lease in 2008, the ship was sold to the Turkish Navy which recommissioned her as TCG Inebolu.
USNS Sioux (T-ATF-171) was a United States Navy Powhatan-class tugboat operated by the Military Sealift Command (MSC). She was in service from 1981 to 2021 and spent the bulk of this time supporting the Pacific Fleet.
Manhattan (YTB‑779/YT-800) is a United States Navy Natick-class large harbor tug named for Manhattan, New York.
USS Ala (YT-139) was a United States Navy yard tug laid down on 23 September 1939 at Bremerton, Washington, by the Puget Sound Navy Yard; launched on 6 November 1939; and completed on 11 March 1940.
The Powhatan class of fleet ocean tugs consists of seven ships built for the United States Navy, and operated by the Military Sealift Command (MSC). The lead ship of the class was launched in 1978 and the last ship in MSC service will be deactivated in 2023. During their service life, the Powhatan's were the most powerful tugs owned by the Navy.
USS Active was a tug constructed in 1888 at San Francisco by the Union Iron Works. The tug, first steel tug built on the West Coast, was launched 4 August 1888. She was acquired by the United States Navy from John D. Spreckels Brothers Co. on 18 April 1898 "for auxiliary purposes incident to a state of war." Converted for naval service at her builder's yard, she was commissioned at the Mare Island Navy Yard on 6 July 1898. She was the third US Navy ship to be named Active.
Defiant (YT‑804) is a United States Navy Valiant-class harbor tug.
Menominee (YT‑807) is a United States Navy Valiant-class harbor tug. The tugboat is named for the people of the Menominee tribe.
The Type V ship is a United States Maritime Commission (MARCOM) designation for World War II tugboats. Type V was used in World War II, Korean War, and the Vietnam War. Type V ships were used to move ships and barges. Type V tugboats were made of either steel or wood hulls. There were four types of tugboats ordered for World War II. The largest type V design was the sea worthy 186-foot (57 m) long steel hull, V4-M-A1. The V4-M-A1 design was used by a number of manufacturers; a total of 49 were built. A smaller steel hull tugboat was the 94-foot (29 m) V2-ME-A1; 26 were built. The largest wooden hull was the 148-foot (45 m) V3-S-AH2, of which 14 were built. The smaller wooden hull was the 58-foot (18 m) V2-M-AL1, which 35 were built. Most V2-M-AL1 tugboats were sent to the United Kingdom for the war efforts under the lend-lease act. The Type V tugs served across the globe during World War II including: Pacific War, European theatre, and in the United States. SS Farallon, and other Type V tugs, were used to help built Normandy ports, including Mulberry harbour, on D-Day, 6 June 1944, and made nine round trips to Normandy to deliver Phoenix breakwaters.
The YT-46-class harbor tugboat was a wood-hulled tugboat design ordered by the U.S. Navy in May and June 1918 during World War I. 40 ships of the type were launched and completed at 13 shipyards: the Charleston Navy Yard; the New Orleans Naval Yard; the Clayton Ship & Boat Building Company, Clayton, New York; the Eastern Shipyard Company, Greenport, New York; the Eastern Shore Shipbuilding Company, Sharpstown, Maryland; the Greenport Basin and Construction Company, Greenport, New York; the Hiltebrant Dry Dock Company, Kingston, New York; Robert Jacob Shipyard, City Island, New York; the Luders Marine Construction Company, Stamford, Connecticut; the Mathis Yacht Building Company, Camden, New Jersey; the New York Yacht, Launch & Engine Company, Bronx, New York; the Vinyard Shipbuilding Company, Milford, Delaware; and the Wheeler Shipyard Corporation, Brooklyn, New York. In 1920, at the Navy's adoption of alpha-numeric hull designations, the ships were classified as yard tugs YT-46 though YT-85.
The YT-86-class harbor tugboat was a wood-hulled tugboat design ordered by the U.S. Navy during World War I. 15 ships of the type were launched and completed, 12 as harbor tugs and three as ambulance boats. All were launched at the Mare Island Naval Shipyard in Vallejo, California except for one at the Pearl Harbor Naval Shipyard in Hawaii. In 1920, after the Navy's adoption of alpha-numeric hull designations, the ships were classified as yard tugs YT-86 though YT-90 and YT-92 through YT-99 and ambulance boats YH-1, YH-2, and YH-3.
United States Navy 
