USS Cormorant (AM-40)
USS Cormorant was an acquired by the United States Navy for the dangerous task of removing mines from minefields laid in the water to prevent ships from passing.
Cormorant was launched 5 February 1919 by Todd Shipbuilding Corp., New York City; sponsored by Miss M. E. Vellaire; and commissioned 15 May 1919.
North Sea mine clearance
Based on Kirkwall in the Orkney Islands, Cormorant joined in the dangerous and exacting task of clearing the North Sea minefields between 22 August 1919 and 1 October. On towing duty, she called at Devonport, Brest, Lisbon, Ponta del Gada, Azores, and Bermuda before returning to Staten Island 19 November 1919 for the Fleet Review in the North River.U.S. East Coast operations
For the next year and a half, she operated along the east coast and in the Caribbean, joining in maneuvers and military simulations, as she towed targets, acted as tender, and carried mail for the Fleet. Between 23 September 1920 and 27 December 1920, she was in ordinary without a crew at Portsmouth, New Hampshire, for repairs, returning then to full commission.On 5 February 1921 Cormorant arrived at Washington, D.C., for experimental work under the Bureau of Ordnance. For the next six years she operated almost exclusively in the Potomac River and Chesapeake Bay testing mine weapons and devices, on occasion going to Newport, Rhode Island, on this duty. Early in 1927 she served for a period of two months as station ship in the Virgin Islands, but experimental mine work continued to be her primary duty. In 1928 she again served in the Virgin Islands for two months, and in 1932, was at Guantanamo Bay, Cuba, for a month to tow targets. Several times in 1933 she steamed to Pensacola, Florida, in connection with experimental mineplanting and sweeping. Similar duty continued through 9 December 1942. On 1 June 1942 she was reclassified AT-133.