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Stalwart class tactical auxiliary general ocean surveillance ships


Stalwart class tactical auxiliary general ocean surveillance ships

USNS Stalwart
Class overview
Builders: 1–12: Tacoma Boatbuilding Company, Tacoma, Washington
13–18: VT Halter Marine, Inc., Moss Point, Mississippi
Operators:  United States
 New Zealand
Preceded by: None
Succeeded by:
In service: April 12, 1984
Completed: 18
Active: 2 not stricken by Naval Vessel Register
General characteristics
Displacement: 1,565 t.(lt) 2,535 t.(fl)
Length: 224 feet
Beam: 43 feet
Draught: 15 feet
Propulsion: diesel-electric, two shafts, 1,600 hp
Speed: 11 knots
Complement: 36

Stalwart class auxiliary general ocean surveillance ships (T-AGOS) were a class of United States Naval Ship (USNS) auxiliary support Ocean Surveillance Ships commissioned between April 1984 and January 1990. Their original purpose was to collect underwater acoustical information using the Surveillance Towed Array Sensor System (SURTASS), a towed array passive sonar.

The USNS Stalwart (T-AGOS 1), USNS Indomitable (T-AGOS 7), and USNS Capable (T-AGOS 16) were modified to support narcotics interdiction by removing SURTASS equipment and adding an air-search radar and tactical data link equipment.[1]


Ship Name Hull No. Delivery-
Fate Link
Stalwart 1 1984–2002 State University of New York Maritime College NavSource
Contender 2 1984–1992 T/V Kings Pointer, flagship and training vessel of the United States Merchant Marine Academy USMMA
Vindicator 3 1984–1993 NOAA Hi'Ialakai (R-334) NOAA
Triumph 4 1985–1995 Stricken, to be disposed of in support of Fleet training exercise NavSource
Assurance 5 1985–1995 Transferred to Portugal as NRP Almirante Gago Coutinho (A523) NavSource
Persistent 6 1985–1995 T/S State of Michigan, Great Lakes Maritime Academy, Traverse City, Michigan NMC
Indomitable 7 1985–2002 NOAA McArthur II (R-330) NOAA
Prevail 8 Reclassified as Unclassified miscellaneous vessel Prevail (IX-537) NavSource
Assertive 9 1986–2004 Transferred to NOAA to be converted FY 2007 and to replace NOAA David Starr Jordan. Damaged during a fire at NOAA's pier in Seattle Washington July 2006, transferred to Seattle Maritime Academy. (R 444) in FY 2008 NavSource
Invincible 10 1987– Converted to T-AGM 24, Missile Range Instrumentation Ship MSC
Audacious 11 1989–1997 Transferred to Portugal as NRP Dom Carlos I (A522) NavSource
Bold 12 1989–2004 EPA Bold (OSV-224) EPA
Adventurous 13 1988–1992 NOAA Oscar Elton Sette (R-335) NOAA
Worthy 14 1988–1993 Transferred to USGS, then to the US Army. Converted to a Missile Range Instrumentation Ship at Kwajalein Atoll's Ronald Reagan Ballistic Missile Defense Test Site KMRSS
Titan 15 1989–1993 NOAA Ka'Imimoana (R-333) NOAA
Capable 16 1989–2004 NOAA Okeanos Explorer (R-337) NOAA
Tenacious 17 1987–1997 Transferred to New Zealand as HMNZS Resolution (A-14) NavSource
Relentless 18 1990–1993 NOAA Gordon Gunter (R-336) NOAA

See also


External links

  • T-AGOS 1 Stalwart Ocean Surveillance Ship

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