Stalwart class auxiliary general ocean surveillance ships (T-AGOS) were a class of United States Naval Ship

United States Naval Ship

United States Naval Ship or USNS is the prefix designation given to non-commissioned ships that are property of the United States Navy.-Overview:...

 (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

Surveillance Towed Array Sensor System

The AN/UQQ-2 Surveillance Towed Array Sensor System is a towed array sonar system of the United States Navy.SURTASS began as development program in 1973 using the new research vessel Moana Wave. In 1980 SURTASS passed OPEVAL...

 (SURTASS), a towed array

Towed array sonar

A towed array sonar is a sonar array that is towed behind a submarine or surface ship. It is basically a long cable, up to 5 km, with hydrophones that is trailed behind the ship when deployed. The hydrophones are placed at specific distances along the cable...

 passive sonar

Sonar

Sonar is a technique that uses sound propagation to navigate, communicate with or detect other vessels...

.

USNS Stalwart (T-AGOS 1), USNS Indomitable (T-AGOS 7) and USNS Capable (T-AGOS 16) were modified to support narcotic

Narcotic

The term narcotic originally referred medically to any psychoactive compound with any sleep-inducing properties. In the United States of America it has since become associated with opioids, commonly morphine and heroin and their derivatives, such as hydrocodone. The term is, today, imprecisely...

s interdiction

Interdiction

Interdiction is a military term that refers to the act of delaying, disrupting, or destroying enemy forces or supplies en route to the battle area. A distinction is often made between strategic and tactical interdiction...

 by removing SURTASS equipment and adding an air-search radar and tactical data link equipment

TADIL-A

TADIL-A/Link 11 is a secure half-duplex TADIL radio link used by NATO that receives or transmits--but not both simultaneously--a sequential data exchange digital link. It exchanges digital information among airborne, land-based, and ship-board tactical data systems. It is the primary means to...

.

Units

Ship Name	Hull No.	Delivery- Stricken	Fate	Link
Stalwart	1	1984–2002	State University of New York Maritime College State University of New York Maritime College SUNY Maritime College is a maritime college located in the Bronx, New York City in historic Fort Schuyler on the Throggs Neck peninsula where the East River meets Long Island Sound...	NVR NavSource
Contender USNS Contender (T-AGOS-2) USNS Contender was a Stalwart class Modified Tactical Auxiliary General Ocean Surveillance Ship of the United States Navy.-History:...	2	1984–1992	T/V Kings Pointer, flagship and training vessel of the United States Merchant Marine Academy United States Merchant Marine Academy The United States Merchant Marine Academy is one of the five United States Service academies...	NVR NavSource USMMA
Vindicator USNS Vindicator (T-AGOS-3) NOAAS Hi'ialakai is a research vessel for the NOAA, but was originally commissioned as USS Vindicator, as a Stalwart class Modified Tactical Auxiliary General Ocean Surveillance Ship for the United States Navy...	3	1984–1993	NOAA National Oceanic and Atmospheric Administration The National Oceanic and Atmospheric Administration , pronounced , like "noah", is a scientific agency within the United States Department of Commerce focused on the conditions of the oceans and the atmosphere...  Hi'Ialakai (R-334)	NVR NavSource NOAA
Triumph USNS Triumph (T-AGOS-4) USNS Triumph was a of the United States Navy. Struck from the Naval Vessel Register in 1995 Triumph is awaiting disposal.....	4	1985–1995	Stricken, to be disposed of in support of Fleet training exercise	NVR NavSource
Assurance USNS Assurance (T-AGOS-5) USNS Assurance was a Stalwart class Modified Tactical Auxiliary General Ocean Surveillance Ship of the United States Navy.Stalwart class ships were originally designed to collect underwater acoustical data in support of Cold war anti-submarine warfare operations in the 1980s. ex-USNS Assurance...	5	1985–1995	Transferred to Portugal as ALM Gago Coutinho (A-523)	NVR NavSource
Persistent USNS Persistent (T-AGOS-6) USNS Persistent was a Stalwart class Modified Tactical Auxiliary General Ocean Surveillance Ship of the United States Navy.Stalwart class ships were originally designed to collect underwater acoustical data in support of Cold war anti-submarine warfare operations in the 1980s. ex-USNS Persistent...	6	1985–1995	T/S State of Michigan, Great Lakes Maritime Academy Great Lakes Maritime Academy The Great Lakes Maritime Academy at Northwestern Michigan College is located on West Grand Traverse Bay in Traverse City, Michigan. The academy was established in 1969 to train men and women to be licensed mariners on ships of unlimited tonnage or horsepower; including research vessels, cruise... , Traverse City, Michigan Traverse City, Michigan Traverse City is a city in the U.S. state of Michigan. It is the county seat of Grand Traverse County, although a small portion extends into Leelanau County. It is the largest city in the 21-county Northern Michigan region. The population was 14,674 at the 2010 census, with 143,372 in the Traverse...	NVR NavSource NMC
Indomitable USNS Indomitable (T-AGOS-7) USNS Indomitable was a United States Navy Stalwart class ocean surveillance ship in service from 1985 to 2002.-History:Indomitable was laid down by the Tacoma Boatbuilding Company at Tacoma, Washington on 26 January 1985 and launched on 16 July 1985. She was delivered to the U.S. Navy on 26...	7	1985–2002	NOAA McArthur II (R-330)	NVR NavSource NOAA
Prevail	8	1986-	Reclassified as Unclassified miscellaneous vessel Unclassified miscellaneous vessel The IX hull classification symbol is used for ships of the United States Navy that do not fit into one of the standard categories...  Prevail (IX-537)	NVR NVR NavSource
Assertive USNS Assertive (T-AGOS-9) USNS Assertive was a Stalwart class Modified Tactical Auxiliary General Ocean Surveillance Ship of the United States Navy.NOAA acquired Ex-USNS Assertive from the United States Navy on 31 March 2004, intending to replace NOAA David Starr Jordan R444 after the Assertive underwent a conversion for...	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 of 2006, transferred to Seattle Maritime Academy. (R 444) in FY 2008	NVR NavSource
Invincible USNS Invincible (T-AGM-24) USNS Invincible , also known as ex-AGOS 10 , is one of two Missile Range Instrumentation Ships operated by the Military Sealift Command. One of the radars it carries is the Cobra Gemini dual band, X band and S band, radar....	10	1987-	Converted to T-AGM 24, Missile Range Instrumentation Ship Missile Range Instrumentation Ship Missile Range Instrumentation Ships, Range Ships, or Tracking Ships, are ships equipped with antennas and electronics to support the launching and tracking of missiles and rockets...	NVR NavSource MSC
Audacious USNS Audacious (T-AGOS-11) USNS Audacious was a Stalwart class Modified Tactical Auxiliary General Ocean Surveillance Ship of the United States Navy.Stalwart class ships were originally designed to collect underwater acoustical data in support of Cold war anti-submarine warfare operations in the 1980s...	11	1989–1997	Transferred to Portugal Portugal Portugal , officially the Portuguese Republic is a country situated in southwestern Europe on the Iberian Peninsula. Portugal is the westernmost country of Europe, and is bordered by the Atlantic Ocean to the West and South and by Spain to the North and East. The Atlantic archipelagos of the...  as ALM Dom Carlos I (A-522)	NVR NavSource
Bold USNS Bold (T-AGOS-12) The Ocean Survey Vessel Bold is operated by the United States Environmental Protection Agency. Originally commissioned as the USNS Victorious, it was renamed USNS Bold and was a Stalwart-class Modified Tactical Auxiliary General Ocean Surveillance Ship of the United States Navy.Stalwart class...	12	1989–2004	EPA United States Environmental Protection Agency The U.S. Environmental Protection Agency is an agency of the federal government of the United States charged with protecting human health and the environment, by writing and enforcing regulations based on laws passed by Congress...  Bold (OSV-224)	NVR NavSource EPA
Adventurous USNS Adventurous (T-AGOS-13) USNS Adventurous was a Stalwart class Modified Tactical Auxiliary General Ocean Surveillance Ship of the United States Navy....	13	1988–1992	NOAA Oscar Elton Sette (R-335)	NVR NavSource NOAA
Worthy USNS Worthy (T-AGOS-14) USNS Worthy was a Stalwart class Modified Tactical Auxiliary General Ocean Surveillance Ship of the United States Navy.-History:...	14	1988–1993	Transferred to USGS United States Geological Survey The United States Geological Survey is a scientific agency of the United States government. The scientists of the USGS study the landscape of the United States, its natural resources, and the natural hazards that threaten it. The organization has four major science disciplines, concerning biology,... , then to the US Army United States Army The United States Army is the main branch of the United States Armed Forces responsible for land-based military operations. It is the largest and oldest established branch of the U.S. military, and is one of seven U.S. uniformed services... . Converted to a Missile Range Instrumentation Ship Missile Range Instrumentation Ship Missile Range Instrumentation Ships, Range Ships, or Tracking Ships, are ships equipped with antennas and electronics to support the launching and tracking of missiles and rockets...  at Kwajalein Kwajalein Kwajalein Atoll , is part of the Republic of the Marshall Islands . The southernmost and largest island in the atoll is named Kwajalein Island. English-speaking residents of the U.S...  Atoll's Ronald Reagan Ballistic Missile Defense Test Site Ronald Reagan Ballistic Missile Defense Test Site The Ronald Reagan Ballistic Missile Defense Test Site, commonly referred to as the Reagan Test Site , is a missile test range in the Pacific Ocean. It covers about and includes rocket launch sites at the Kwajalein Atoll , Wake Island, and Aur Atoll. It primarily functions as a test facility for U.S...	NVR NavSource KMRSS
Titan USNS Titan (T-AGOS-15) USNS Titan was a Stalwart class Modified Tactical Auxiliary General Ocean Surveillance Ship of the United States Navy.-History:...	15	1989–1993	NOAA Ka'Imimoana (R-333)	NVR NavSource NOAA
Capable USNS Capable (T-AGOS-16) USNS Capable was a Stalwart class Modified Tactical Auxiliary General Ocean Surveillance Ship of the United States Navy.Stalwart class ships were originally designed to collect underwater acoustical data in support of Cold war anti-submarine warfare operations in the 1980s...	16	1989–2004	NOAA Okeanos Explorer Okeanos Explorer NOAAS Okeanos Explorer is a converted United States Navy ship , now an exploratory vessel for the National Oceanic and Atmospheric Administration , and will officially launch in 2010. Meanwhile, it is engaging in trial voyages before its maiden voyage planned for the Pacific Ocean, near Indonesia... (R-337)	NVR NavSource NOAA
Tenacious HMNZS Resolution (A-14) HMNZS Resolution is the hydrographic ship of the Royal New Zealand Navy . Originally the United States Naval Ship USNS Tenacious , the Stalwart class ocean surveillance ship was used by the United States to locate and track Soviet submarines from 1989 to 1997, when she was transferred to the RNZN...	17	1987–1997	Transferred to New Zealand New Zealand New Zealand is an island country in the south-western Pacific Ocean comprising two main landmasses and numerous smaller islands. The country is situated some east of Australia across the Tasman Sea, and roughly south of the Pacific island nations of New Caledonia, Fiji, and Tonga...  as HMNZS Resolution (A-14)	NVR NavSource
Relentless USNS Relentless (T-AGOS-18) USNS Relentless was a Stalwart class Modified Tactical Auxiliary General Ocean Surveillance Ship of the United States Navy.Stalwart class ships were originally designed to collect underwater acoustical data in support of Cold war anti-submarine warfare operations in the 1980s...	18	1990–1993	NOAA Gordon Gunter (R-336)	NVR NavSource NOAA

External links

• T-AGOS 1 Stalwart Ocean Surveillance Ship