USS Constant (AM-427) - AbsoluteAstronomy.com

USS Constant, (AM-427/MSO-427) was an Aggressive class minesweeper

Aggressive class minesweeper

The Aggressive class minesweepers are a class of US-built minesweepers. They are designated as MSO , distinguishing them from the smaller coastal MSCs and inshore MSIs...

vessel in the United States Navy

United States Navy

The United States Navy is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States. The U.S. Navy is the largest in the world; its battle fleet tonnage is greater than that of the next 13 largest navies combined. The U.S...

.

Constant was laid down on 16 August 1951 at Fulton Shipyard, Antioch, California

Antioch, California

Antioch is a city in Contra Costa County, California. Located in the East Bay region of the San Francisco Bay Area along the San Joaquin-Sacramento River Delta, it is a suburb of San Francisco and Oakland. The city's population was 102,372 at the U.S...

and launched on 14 February 1953. She was commissioned as Constant, AM-427) on 8 September 1954 and later reclassified as an Ocean Minesweeper

Minesweeper (ship)

A minesweeper is a small naval warship designed to counter the threat posed by naval mines. Minesweepers generally detect then neutralize mines in advance of other naval operations.-History:...

MSO-427 on 7 February 1955.
Constant operated on the west coast until she cleared Long Beach, California

Long Beach, California

Long Beach is a city situated in Los Angeles County in Southern California, on the Pacific coast of the United States. The city is the 36th-largest city in the nation and the seventh-largest in California. As of 2010, its population was 462,257...

, 4 January 1956 for Pearl Harbor

Pearl Harbor

Pearl Harbor, known to Hawaiians as Puuloa, is a lagoon harbor on the island of Oahu, Hawaii, west of Honolulu. Much of the harbor and surrounding lands is a United States Navy deep-water naval base. It is also the headquarters of the U.S. Pacific Fleet...

and Yokosuka, Japan, arriving 4 February.