Stalwart-class ocean surveillance ship

The Stalwart-class auxiliary general ocean surveillance ships (T-AGOS) are a class of United States Naval Ship (USNS) auxiliary support ocean surveillance ships commissioned between April 1984 and October 2000. Their original purpose was to collect underwater acoustical information using the Surveillance Towed Array Sensor System (SURTASS), a towed array passive sonar.

Stalwart, Indomitable, and Capable were modified to support narcotics interdiction by removing SURTASS equipment and adding an air-search radar and tactical data link equipment.The US Navy

Units Ship NameHull No.Delivery-StrickenFateLinkStalwart11984–20022026 survey ship OCEAN STALWART NavSourceContender21984–1992T/V General Rudder, flagship and training vessel of the Texas A&M University at Galveston NavSource Vindicator31984–1993Later USCGC Vindicator (WMEC-3) (1994-2001), then NOAAS Hiʻialakai (R 334) (2004-2020). Sold by GSA to private interests in 2023 and pending return to service NavSource NOAATriumph41985–1995Stricken, to be disposed of in support of Fleet training exercise NavSourceAssurance51985–1995Transferred to Portugal as NRP Almirante Gago Coutinho (A523) NavSourcePersistent61985–1995T/S State of Michigan, Great Lakes Maritime Academy, Traverse City, Michigan NavSource NMCIndomitable71985–2002now private ocean expedition and dive support vessel DAGON NavSource NOAA81986–Reclassified as Unclassified miscellaneous vessel Prevail (IX-537) NavSourceAssertive91986–2004scrapped in 2024 NavSourceInvincible101987–2021Converted to T-AGM 24, Missile Range Instrumentation Ship NavSource MSCAudacious111989–1997Transferred to Portugal as NRP Dom Carlos I (A522) NavSourceVigorous, renamed Bold121989–2004today operates as survey vessel Bold Explorer NavSource EPAAdventurous131988–1992NOAA Oscar Elton Sette (R-335) NavSource NOAAWorthy141988–1993Transferred 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 NavSource KMRSSTitan151989–1993today in commercial service as Ocean Titan NavSource NOAACapable161989–2004NOAA Okeanos Explorer (R-337) NavSource NOAATenacious171987–1997Today operates as commercial survey vessel Geo Resolution NavSourceRelentless181990–1993NOAA Gordon Gunter (R-336) NavSource NOAA

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