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

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