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.[1]
| Ship Name | Hull No. | Delivery- Stricken | Fate | Link | |
|---|---|---|---|---|---|
| Stalwart | 1 | 1984–2002 | State University of New York Maritime College | NavSource | |
| Contender | 2 | 1984–1992 | T/V General Rudder, flagship and training vessel of the Texas A&M University at Galveston | NavSource | |
| Vindicator | 3 | 1984–1993 | NOAA Hi'Ialakai (R-334) | NavSource 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 | NavSource NMC | |
| Indomitable | 7 | 1985–2002 | NOAA McArthur II (R-330) | NavSource NOAA | |
| 8 | 1986– | 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 | NavSource MSC | |
| Audacious | 11 | 1989–1997 | Transferred to Portugal as NRP Dom Carlos I (A522) | NavSource | |
| Vigorous, renamed Bold | 12 | 1989–2004 | EPA Bold (OSV-224) until ~2013. Converted to R/V Bold Explorer, EGS Group, 2020.[2] | NavSource EPA | |
| Adventurous | 13 | 1988–1992 | NOAA Oscar Elton Sette (R-335) | NavSource 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 | NavSource KMRSS | |
| Titan | 15 | 1989–1993 | NOAA Ka'Imimoana (R-333) until June 18, 2014; Research/Survey Vessel Ocean Titan IMO: 8835231 survey vessel own by Stabbert Maritime | NavSource NOAA | |
| Capable | 16 | 1989–2004 | NOAA Okeanos Explorer (R-337) | NavSource NOAA | |
| Tenacious | 17 | 1987–1997 | Transferred to New Zealand as (1997-2012), then sold into civilian service to EGS Group and renamed RV Geo Resolution | NavSource | |
| Relentless | 18 | 1990–1993 | NOAA Gordon Gunter (R-336) | NavSource NOAA |