USS Constant (MSO-427)

For other ships of the same name, see USS Constant.
Career (US)
Builder: Fulton Shipyard, Antioch, California
Laid down: 16 August 1951
Launched: 14 February 1953
Acquired: 7 September 1954
Commissioned: 8 September 1954
Decommissioned: 30 September 1992
Reclassified: MSO-427, 7 February 1955
Struck: 9 March 1994
Fate: Scrapped, 1 April 2001
General characteristics
Class & type: Aggressive class minesweeper
Displacement: 775 tons
Length: 172 ft (52.43 m)
Beam: 36 ft (10.97 m)
Draught: 10 ft (3.05 m)
Propulsion: Four Packard ID1700 diesel engines, two shafts, two controllable pitch propellers
Speed: 14 knots
Complement: 6 Officers, 74 Enlisted
Armament: 1 40mm., 2 .50-cal. mg

USS Constant, (AM-427/MSO-427) was an Aggressive class minesweeper vessel in the United States Navy.

Constant was laid down on 16 August 1951 at Fulton Shipyard, Antioch, California and launched on 14 February 1953. She was commissioned as Constant, AM-427) on 8 September 1954 and later reclassified as an Ocean Minesweeper MSO-427 on 7 February 1955.

Pacific Ocean operations

Constant operated on the west coast until she cleared Long Beach, California, 4 January 1956 for Pearl Harbor and Yokosuka, Japan, arriving 4 February. She joined in amphibious exercises at Iwo Jima, made repairs to cables and conducted minesweeping and local operations from her base at Sasebo until 28 March. Between 2 April and 19 May, she sailed in training exercises with naval forces of the Republic of China based on Kaohsiung, Taiwan. She returned to Sasebo 20 April to resume operations in Japanese waters until 19 May, when she cleared Yokosuka, Japan, for Long Beach, California, arriving 15 June.

Stateside Overhaul

After overhaul and west coast operations, Constant sailed from Long Beach, California, 2 June 1958, for Sasebo and duty in minesweeping off Okinawa, as well as other local operations from 3 July to 30 August. She stood by at Taiwan from 2 September until 27 October during the Quemoy Crisis, then called at Hong Kong, before returning to Japan. She cleared Yokosuka, Japan, 12 December for Long Beach, California, arriving 6 January 1959. Through the remainder of 1959, and the first half of 1960, she operated locally from Long Beach. On 31 August Constant sailed for duty in the Far East, where she remained into 1961. In the mid-1980s, she participated in one or more extended endurance Naval Reserve summer training cruises (with reservists embarked) from her homeport in San Diego to as far away as the Naval Air Station in Adak, AK. In June, 1985, USS Constant called at the following ports: U.S. Coast Guard Station Juneau, AK, and at U.S. Coast Guard Air Station Kodiak Island, AK.


Constant was decommissioned, 30 September 1992; struck from the Naval Register, 9 March 1994; sold for scrapping to Crowley Marine, removal date 29 September 1999; scrapped, 1 April 2001.

See also


This article incorporates text from the public domain Dictionary of American Naval Fighting Ships.

External links

  • Dictionary of American Naval Fighting Ships - Constant II
  • NavSource Online: Mine Warfare Vessel Photo Archive - AM / MSO-427 Constant
  • NVR - MSO-427
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.