USNS Effective (T-AGOS-21)

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USNS Effective T-AGOS-21.jpg
USNS Effective (T-AGOS-21)
Career (USA)
Name: USS Effective
Operator: United States Navy
Awarded: 7 October 1988
Builder: Mc Dermott Shipyards, Morgan City, Louisiana
Laid down: 15 February 1991
Launched: 26 September 1991
Acquired: 27 January 1993
Honors and
National Defense Service Medal
Notes: Currently in service
General characteristics
Type: Victorious-class ocean surveillance ship
Tonnage: 3,100 tons
Displacement: 3,384 tons
Length: 235'
Beam: 94'
Draft: 24' (max)
Propulsion: diesel-electric, two shafts, 1,600hp
Speed: 9.6 knots
Complement: 19 civilian mariners, 5 sponsors
Sensors and
processing systems:
both passive and active low frequency sonar arrays

USNS Effective (T-AGOS-21) is a Victorious-class ocean surveillance ship acquired by the U.S. Navy in 1993 and assigned to the Navy’s Special Mission Program.

Built in Louisiana

Effective was built by Mc Dermott Shipyards, Morgan City, Louisiana. She was laid down on 15 February 1991 and launched 26 September 1991 and was delivered to the Navy on 27 January 1993 which assigned her to the Military Sealift Command (MSC) Special Missions Program.


The mission of Effective is to directly support the Navy by using both passive and active low frequency sonar arrays to detect and track undersea threats.

Operational history

There is no current operational history on Effective.

Honors and awards

Effective personnel are qualified for the following medals:

  • National Defense Service Medal



There is no journal entry on Effective at DANFS.