Ocean Surveillance Ships
(AGOS)
Most recent update: August 5, 2020.
One element of the naval build-up of the 1980s was the construction of 18 Stalwart-class ocean surveillance ships, designed to monitor worldwide movements of Soviet submarines. Before they were even completed, however, the Cold War was over and they were no longer needed: all 18 moved on to new careers. A new class of four larger ships was then built, which are still in service. A second new-class was started, but the first ship was a contractual disaster and the remainder were cancelled.
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| Name | Builder | Location | LDT | LOA | Delivered | Notes | ||
| AGOS-1 | Stalwart | Tacoma boat | Tacoma WA | 403 | 1,600 | 224 | 9 Apr 1984 | to NYSMA 2002 as SUNY Maritime, sold 2011 as r/v Ocean Stalwart |
| AGOS-2 | Contender | Tacoma boat | Tacoma WA | 404 | 1,600 | 224 | 5 Jun 1984 | to USMMA 1992 as Kings Pointer, to Texas MA 2012 as General Rudder |
| AGOS-3 | Vindicator | Tacoma boat | Tacoma WA | 405 | 1,600 | 224 | 20 Nov 1984 | to NOAA 2002 as Hi'ialakai (R-334) |
| AGOS-4 | Triumph | Tacoma boat | Tacoma WA | 406 | 1,600 | 224 | 20 Feb 1985 | to NDRF 1994 |
| AGOS-5 | Assurance | Tacoma boat | Tacoma WA | 407 | 1,600 | 224 | 1 May 1985 | to Portugal 1995 as ALM Gago Coutinho (A-523) |
| AGOS-6 | Persistent | Tacoma boat | Tacoma WA | 408 | 1,600 | 224 | 14 Aug 1985 | to Great Lakes MA 2002 as State of Michigan |
| AGOS-7 | Indomitable | Tacoma boat | Tacoma WA | 409 | 1,600 | 224 | 27 Nov 1985 | to NOAA 2002 as McArthur II (R-330) |
| AGOS-8 | Prevail | Tacoma boat | Tacoma WA | 410 | 1,600 | 224 | 4 Mar 1986 | training ship (IX-537) 2003 |
| AGOS-9 | Assertive | Tacoma boat | Tacoma WA | 411 | 1,600 | 224 | 9 Sep 1986 | to NOAA 2004, to Seattle MA 2008 |
| AGOS-10 | Invincible | Tacoma boat | Tacoma WA | 412 | 1,600 | 224 | 30 Jan 1987 | converted to T-AGM-24 2000 |
| AGOS-11 | Audacious | Tacoma boat | Tacoma WA | 448 | 1,600 | 224 | 12 Jun 1989 | to Portugal 1996 as Dom Carlos I (A-522) |
| AGOS-12 | Bold | Tacoma boat | Tacoma WA | 449 | 1,600 | 224 | 20 Oct 1989 | to EPA 2004 as Bold (OSV 224), to Seattle MA 2013 |
| AGOS-13 | Adventurous | Halter Marine | Moss Point MS | M230 | 1,600 | 224 | 19 Aug 1988 | to NOAA 1992 as Oscar Elton Sette (R-335) |
| AGOS-14 | Worthy | Halter Marine | Moss Point MS | M231 | 1,600 | 224 | 4 Apr 1988 | to US Army 1995 as WAGM |
| AGOS-15 | Titan | Halter Marine | Moss Point MS | M232 | 1,600 | 224 | 8 Mar 1989 | to NOAA 1993 as Ka'imimoana (R-333) |
| AGOS-16 | Capable | Halter Marine | Moss Point MS | M233 | 1,600 | 224 | 9 Jun 1989 | to NOAA 2004 as Okeanos Explorer (R-337) |
| AGOS-17 | Tenacious | Halter Marine | Moss Point MS | M234 | 1,600 | 224 | 29 Sep 1989 | to New Zealand 1997 as Resolution (A-14), for sale 2012 |
| AGOS-18 | Relentless | Halter Marine | Moss Point MS | M235 | 1,600 | 224 | 12 Jan 1990 | to NOAA 1993 as Gordon Gunter (R-336) |
| AGOS-19 | Victorious | McDermott | McDermott | 279 | 3,100 | 235 | 13 Aug 1991 | |
| AGOS-20 | Able | McDermott | McDermott | 287 | 3,100 | 235 | 22 Jul 1992 | |
| AGOS-21 | Effective | McDermott | McDermott | 288 | 3,100 | 235 | 27 Jan 1993 | |
| AGOS-22 | Loyal | McDermott | McDermott | 289 | 3,100 | 235 | 1 Jul 1993 | |
| AGOS-23 | Impeccable | Tampa Shipyards | Tampa FL | 2,800 | 281 | 13 Oct 2000 | completed by Halter Marine | |
| AGOS 31-37 | VT Halter Marine | Moss Point MS | design development |