USS Impervious (AM-449/MSO-449) was an Agile-class minesweeper acquired by the U.S. Navy for the task of removing mines that had been placed in the water to prevent the safe passage of ships.

Impervious was launched by Martinolich Shipbuilding Co., San Diego, California, 29 August 1952; sponsored by Miss Mary Lin Moore; and commissioned 15 July 1954.

During this deployment, she operated with ships of the Republic of Korea Navy and visited Taiwan before returning to her home port, Long Beach, 15 February 1956.

The ship spent 1961 and early 1962 on important readiness operations, visiting several West Coast ports, and sailed again for U.S. 7th Fleet duty 7 April 1962.

She got underway for the western Pacific again 8 May 1964, and after stopping at various islands moved to the coast of South Vietnam in September for special operations supporting the American Advisory unit.

Tripoli proceeded into the northern Persian Gulf and assumed duties as flagship for Airborne Mine Countermeasures operations there with MH 53 deployed aboard.

Allied minesweepers from Saudi Arabia, Great Britain and Kuwait, and the MH-53 Super Stallions of Mine Countermeasures Helicopter Squadron 14 joined the MCM effort.

After months of training off Dubai, United Arab Emirates, USMCMG staff embarked in USS Tripoli (LPH 10) on 20 January, and proceeded to the northern Gulf waters to perform their mission.

The mine-clearing task force spent the first few weeks of Desert Storm pushing 24 miles to "Point Foxtrot," a 10-mile by 3.5-mile box which became the battleship gunfire support area south of Faylaka Island.

While sweeping further toward shore, the task group was targeted by Iraqi fire control radars associated with Silkworm missile sites inside Kuwait.

As damage control teams successfully overcame fires and flooding aboard Tripoli and Princeton, Impervious, Leader and Avenger searched for additional mines in the area.

Charts and intelligence captured from Iraq showed the mine field where Tripoli and Princeton were hit was one of six laid in a 150-mile arc from Faylaka Island to the Saudi-Kuwaiti border.

Three days later, the massive 31-ship amphibious task force moved north to assist in battlefield preparation as the deadline for the ground offensive neared.

As Wisconsin and Missouri steamed in the vicinity of recently cleared "Point FOXTROT," their gun crews continued to pound Iraqi targets.