Lapwing-class minesweeper
The Lapwing-class minesweeper, often called the Bird class, was an early "AM-type" oceangoing minesweeper of the United States Navy. Seven 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.
The propulsion system consisted of 2 Babcock & Wilcox 200psi boilers and a 1,400shp Harlan and Hollingsworth triple expansion reciprocating steam engine.
Ships
The table makes no distinction between classification as "Minesweeper No. X" and "AM-X". This change affected all boats equally ca. 1920.All boats reclassified as Fleet Tugs where later again reclassified as Fleet Tug, Old . The table treats them the same. Brant and Grebe were never reclassified as ATO.
| Ship name | Hull number | Builder | Commissioned | Decommissioned | Fate |
| Lapwing | AM-1 | Todd Brooklyn | 12 Jun 1918 | 11 Apr 1922 | Sold, 19 August 1946; fate unknown |
| Lapwing | AVP-1 | Todd Brooklyn | 1 Sep 1932 | 29 Nov 1945 | Sold, 19 August 1946; fate unknown |
| Owl | AM-2 | Todd Brooklyn | 11 Jul 1918 | Sold for scrap, 27 June 1947 | |
| Owl | AT-137 | Todd Brooklyn | 1 Jun 1942 | 26 Jul 1946 | Sold for scrap, 27 June 1947 |
| Robin | AM-3 | Todd Brooklyn | 29 Aug 1918 | Sold for scrap, 1945 | |
| Robin | AT-140 | Todd Brooklyn | 1 Jun 1942 | 9 Nov 1945 | Sold for scrap, 1945 |
| Swallow | AM-4 | Todd Brooklyn | 8 Oct 1918 | n/a | Ran aground, 19 February 1938; later sank |
| Tanager | AM-5 | Staten Island Shipbuilding Company | 28 Jun 1918 | n/a | Sank, 4 May 1942 |
| Cardinal | AM-6 | Staten Island Shipbuilding Company | 23 Aug 1918 | n/a | Ran aground, 6 June 1923; later sank |
| Oriole | AM-7 | Staten Island Shipbuilding Company | 5 Nov 1918 15 Aug 1938 | 3 May 1922 | Sold 1947 |
| Oriole | AT-136 | Staten Island Shipbuilding Company | 1 Jun 1942 | 6 Feb 1946 | Sold 1947 |
| Curlew | AM-8 | Staten Island Shipbuilding Company | 7 Jan 1919 | n/a | Ran aground, 15 December 1925; later sank |
| Finch | AM-9 | Standard Shipbuilding Company | 10 Sep 1918 | n/a | Sank, 10 Apr 1942;salvaged later sunk 12 January 1945 |
| Heron | AM-10 | Standard Shipbuilding Company | 30 Oct 1918 18 Sep 1924 | 6 Apr 1922 | Sold for scrap, 25 July 1947 |
| Heron | AVP-2 | Standard Shipbuilding Company | 27 Jan 1936 | 12 Feb 1946 | Sold for scrap, 25 July 1947 |
| Condor | AM-11 | never | never | Construction cancelled, 4 December 1918 | |
| Plover | AM-12 | never | never | Construction cancelled, 4 December 1918 | |
| Turkey | AM-13 | Merchant Shipbuilding Corporation | 13 Dec 1918 | 12 Apr 1922 | Sold for scrap, 30 December 1946 |
| Turkey | AT-143 | Merchant Shipbuilding Corporation | 1 Jun 1942 | 6 Nov 1945 | Sold for scrap, 30 December 1946 |
| Woodcock | AM-14 | Merchant Shipbuilding Corporation | 19 Feb 1919 21 Feb 1924 | 5 May 1922 | Sold for scrap, 19 December 1947 |
| Woodcock | AT-145 | Merchant Shipbuilding Corporation | 1 Jun 1942 | 30 Sep 1946 | Sold for scrap, 19 December 1947 |
| Quail | AM-15 | Merchant Shipbuilding Corporation | 29 Apr 1919 | n/a | Scuttled to prevent capture, 5 May 1942 |
| Partridge | AM-16 | Merchant Shipbuilding Corporation | 17 Jun 1919 | n/a | Sank, 11 June 1944 |
| Eider | AM-17 | Pusey and Jones | 23 Jan 1919 | 18 Apr 1922 | Fate unknown |
| Eider | YNG-20 | Pusey and Jones | 7 Oct 1940 | 28 Nov 1945 | Fate unknown |
| Thrush | AM-18 | Pusey and Jones | 25 Apr 1919 | 3 Apr 1922 | Sold to a commercial interest, 21 August 1946; Sank, 10 March 1951 |
| Thrush | AVP-3 | Pusey and Jones | 31 Oct 1935 | 13 Dec 1945 | Sold to a commercial interest, 21 August 1946; Sank, 10 March 1951 |
| Avocet | AM-19 | Baltimore Dry Dock and Shipbuilding | 17 Sep 1918 8 Sep 1925 | 3 Apr 1922 | Sold for scrap, 12 December 1946 |
| Avocet | AVP-4 | Baltimore Dry Dock and Shipbuilding | 22 Jan 1936 | 10 Dec 1945 | Sold for scrap, 12 December 1946 |
| Bobolink | AM-20 | Baltimore Dry Dock and Shipbuilding | 28 Jan 1919 | Fate unknown | |
| Bobolink | AT-131 | Baltimore Dry Dock and Shipbuilding | 1 Jun 1942 | 22 Feb 1946 | Fate unknown |
| Lark | AM-21 | Baltimore Dry Dock and Shipbuilding | 12 Apr 1919 | Fate unknown | |
| Lark | AT-168 | Baltimore Dry Dock and Shipbuilding | 1 Mar 1944 | 7 February 1946 | Fate unknown |
| Widgeon | AM-22 | Sun Shipbuilding and Drydock Company | 27 Jul 1918 | Sold for scrap, 5 March 1948 | |
| Widgeon | ASR-1 | Sun Shipbuilding and Drydock Company | 22 Jun 1936 | 5 Feb 1947 | Sold for scrap, 5 March 1948 |
| Teal | AM-23 | Sun Shipbuilding and Drydock Company | 20 Aug 1918 | Fate unknown | |
| Teal | AVP-5 | Sun Shipbuilding and Drydock Company | 22 Jan 1936 | 23 Nov 1945 | Fate unknown |
| Brant | AM-24 | Sun Shipbuilding and Drydock Company | 5 Sep 1918 | Fate unknown | |
| Brant | AT-132 | Sun Shipbuilding and Drydock Company | 1 Jun 1942 | Fate unknown | |
| Brant | ARS-32 | Sun Shipbuilding and Drydock Company | 1 Sep 1942 | 19 Dec 1945 | Fate unknown |
| Kingfisher | AM-25 | Puget Sound Navy Yard | 27 May 1918 | Fate unknown | |
| Kingfisher | AT-135 | Puget Sound Navy Yard | 1 Jun 1942 | 6 Feb 1946 | Fate unknown |
| Rail | AM-26 | Puget Sound Navy Yard | 5 Jun 1918 | Fate unknown | |
| Rail | AT-139 | Puget Sound Navy Yard | 1 Jun 1942 | 29 Apr 1946 | Fate unknown |
| Pelican | AM-27 | Gas Engine and Power Company | 10 Oct 1918 | Sold for scrap, November 1946 | |
| Pelican | AVP-6 | Gas Engine and Power Company | 22 Jan 1936 | 30 Nov 1945 | Sold for scrap, November 1946 |
| Falcon | AM-28 | Gas Engine and Power Company | 12 Nov 1918 | Fate unknown | |
| Falcon | ASR-2 | Gas Engine and Power Company | 12 Sep 1929 | 18 Jun 1946 | Fate unknown |
| Osprey | AM-29 | Gas Engine and Power Company | 7 Jan 1919 | 12 Dec 1920 | Sold for scrap, 1952 |
| Osprey | ARS-2 | Gas Engine and Power Company | 17 Sep 1941 | 13 Feb 1947 | Sold for scrap, 1952 |
| Seagull | AM-30 | Gas Engine and Power Company | 7 Mar 1919 | Fate unknown | |
| Seagull | AT-141 | Gas Engine and Power Company | 1 Jun 1942 | 5 Sep 1946 | Fate unknown |
| Tern | AM-31 | Gas Engine and Power Company | 17 May 1919 | Fate unknown | |
| Tern | AT-142 | Gas Engine and Power Company | 1 Jun 1942 | 23 Nov 1945 | Fate unknown |
| Flamingo | AM-32 | New Jersey Dry Dock and Transportation Company | 12 Feb 1919 | 17 Mar 1953 | Sold for scrap, 22 July 1953 |
| Penguin | AM-33 | New Jersey Dry Dock and Transportation Company | 21 Nov 1918 | n/a | Scuttled to prevent capture, 8 December 1941 |
| Swan | AM-34 | Alabama Drydock and Shipbuilding Company | 31 Jan 1919 | Fate unknown | |
| Swan | AVP-7 | Alabama Drydock and Shipbuilding Company | 22 Jan 1936 | 13 Dec 1945 | Fate unknown |
| Whippoorwill | AM-35 | Alabama Drydock and Shipbuilding Company | 1 Apr 1919 | Fate unknown | |
| Whippoorwill | AT-169 | Alabama Drydock and Shipbuilding Company | 1 Mar 1944 | 17 Apr 1946 | Fate unknown |
| Bittern | AM-36 | Alabama Drydock and Shipbuilding Company | 28 May 1919 | n/a | Scuttled following incapacitating damage, 10 December 1941 |
| Sanderling | AM-37 | Todd Brooklyn | 4 Dec 1918 | 2 May 1922 | Accidentally sank while under tow, 26 June 1937 |
| Auk | AM-38 | Todd Brooklyn | 31 Jan 1919 | 28 Jan 1947 | Transferred to Venezuela, 9 June 1947; decommissioned in 1962 and abandoned as of 2019 |
| Chewink | AM-39 | Todd Brooklyn | 9 Apr 1919 | 4 Feb 1947 | Sunk as a target, 31 July 1947 |
| Chewink | ASR-3 | Todd Brooklyn | 9 April 1919 | 4 February 1947 | Sunk as a target, 31 July 1947 |
| Cormorant | AM-40 | Todd Brooklyn | 15 May 1919 | 29 March 1946 | Fate unknown |
| Cormorant | AT-133 | Todd Brooklyn | 15 May 1919 | 29 March 1946 | Fate unknown |
| Gannet | AM-41 | Todd Brooklyn | 10 July 1919 | n/a | Sunk, 7 June 1942 |
| Gannet | AVP-8 | Todd Brooklyn | 10 July 1919 | n/a | Sunk, 7 June 1942 |
| Goshawk | AM-42 | never | never | Construction cancelled, 4 December 1918 | |
| Grebe | AM-43 | Staten Island Shipbuilding Company | 1 May 1919 | n/a | Ran aground, 6 December 1942; destroyed by hurricane, 1–2 January 1943 |
| Grebe | AT-134 | Staten Island Shipbuilding Company | 1 May 1919 | n/a | Ran aground, 6 December 1942; destroyed by hurricane, 1–2 January 1943 |
| Mallard | AM-44 | Staten Island Shipbuilding Company | 25 Jun 1919 | 10 Dec 1946 | Sunk as a target, 22 May 1947 |
| Mallard | ASR-4 | Staten Island Shipbuilding Company | 25 Jun 1919 | 10 Dec 1946 | Sunk as a target, 22 May 1947 |
| Ortolan | AM-45 | Staten Island Shipbuilding Company | 17 Sep 1919 | 18 Mar 1947 | Fate unknown |
| Ortolan | ASR-5 | Staten Island Shipbuilding Company | 17 Sep 1919 | 18 Mar 1947 | Fate unknown |
| Peacock | AM-46 | Staten Island Shipbuilding Company | 27 Dec 1919 | n/a | Sunk, 24 August 1940 |
| Pigeon | AM-47 | Baltimore Dry Dock and Shipbuilding | 15 July 1919 | n/a | Sunk, 4 May 1942 |
| Pigeon | ASR-6 | Baltimore Dry Dock and Shipbuilding | 15 July 1919 | n/a | Sunk, 4 May 1942 |
| Redwing | AM-48 | Baltimore Dry Dock and Shipbuilding | 17 October 1919 | n/a | Sunk, 29 June 1943 |
| Redwing | ARS-4 | Baltimore Dry Dock and Shipbuilding | 17 October 1919 | n/a | Sunk, 29 June 1943 |
| Raven | AM-49 | never | never | Construction cancelled, 4 December 1918 | |
| Shrike | AM-50 | never | never | Construction cancelled, 4 December 1918 | |
| Sandpiper | AM-51 | Philadelphia Navy Yard | 9 October 1919 | 10 December 1945 | Fate unknown |
| Sandpiper | AVP-9 | Philadelphia Navy Yard | 9 October 1919 | 10 December 1945 | Fate unknown |
| Vireo | AM-52 | Philadelphia Navy Yard | 16 October 1919 | 18 April 1946 | Fate unknown |
| Vireo | AT-144 | Philadelphia Navy Yard | 16 October 1919 | 18 April 1946 | Fate unknown |
| Warbler | AM-53 | Philadelphia Navy Yard | 22 December 1919 | 29 March 1946 | Fate unknown |
| Warbler | ARS-11 | Philadelphia Navy Yard | 22 December 1919 | 29 March 1946 | Fate unknown |
| Willet | AM-54 | Philadelphia Navy Yard | 29 January 1920 | 1 December 1947 | Sold for scrap 2 November 1948 |
| Willet | ARS-12 | Philadelphia Navy Yard | 29 January 1920 | 1 December 1947 | Sold for scrap 2 November 1948 |