Lapwing class minesweeper

USS Lapwing (AM-1) and other ships of the squadron anchored in the Hudson River, off New York City
Class overview
Operators:	United States Navy
Succeeded by:	Raven-class minesweeper
Built:	1917–1919
In commission:	1918–1953
Completed:	48
General characteristics
Type:	Minesweeper
Displacement:	840 long tons (853 t)
Length:	187 ft 10 in (57.25 m)
Beam:	35 ft 5 in (10.80 m)
Draft:	15 ft (4.6 m)
Propulsion:	Reciprocating engine
Speed:	14 knots (16 mph; 26 km/h)
Complement:	75
Armament:	2 × 3 in (76 mm)/50 caliber guns

The Lapwing-class minesweeper, often called the Bird class, was an early "AM-type" oceangoing minesweeper of the United States Navy. Forty-eight ships of the class were commissioned during World War I, and served well into the 1950s. A number were refitted to serve as ocean-going tugs, salvage vessels, seaplane tenders, or submarine rescue ships.