YT-46-class harbor tugboat

U.S. Navy Harbor Tug No. 85, circa 1919
Class overview
Name	YT-46-class harbor tugboat
Builders	Charleston Navy Yard New Orleans Naval Yard Clayton Ship & Boat Building Company, Clayton, New York Eastern Shipyard Company, Greenport, New York Eastern Shore Shipbuilding Company, Sharpstown, Maryland Greenport Basin and Construction Company, Greenport, New York Hiltebrant Dry Dock Company, Kingston, New York Robert Jacob Shipyard, City Island, New York Luders Marine Construction Company, Stamford, Connecticut Mathis Yacht Building Company, Camden, New Jersey New York Yacht, Launch & Engine Company, Bronx, New York Vinyard Shipbuilding Company, Milford, Delaware Wheeler Shipyard Corporation, Brooklyn, New York
Built	1918-1919
Planned	40
Completed	40
General characteristics
Type	Tugboat
Tonnage	215 gross tons
Length	88 ft 8 in (27.03 m)
Beam	20 ft 0 in (6.10 m)
Draft	8 ft 9 in (2.67 m)

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 (Harbor Tugs Nos. 46-85) 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.