Ocean Surveillance Ships (AGOS)

Most recent update: April 21, 2015.


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.  

Type # Original Name Built by Location Hull # LDT LOA Delivery Disposition
AGOS 1 Stalwart Tacoma Boat Tacoma WA 403 1,600 224 9-Apr-84 To NYSMA 2002 as SUNY Maritime, sold 2011 as r/v Ocean Stalwart, active
AGOS 2 Contender Tacoma Boat Tacoma WA 404 1,600 224 5-Jun-84 To USMMA 1992 as Kings Pointer, to Texas MA 2012 as General Rudder, active
AGOS 3 Vindicator Tacoma Boat Tacoma WA 405 1,600 224 20-Nov-84 To NOAA 2002 as Hi'ialakai (R 334), active
AGOS 4 Triumph Tacoma Boat Tacoma WA 406 1,600 224 20-Feb-85 To NDRF 1994
AGOS 5 Assurance Tacoma Boat Tacoma WA 407 1,600 224 1-May-85 To Portugal 1995 as ALM Gago Coutinho (A 523), active
AGOS 6 Persistent Tacoma Boat Tacoma WA 408 1,600 224 14-Aug-85 To Great Lakes MA 2002 as State of Michigan, active
AGOS 7 Indomitable Tacoma Boat Tacoma WA 409 1,600 224 27-Nov-85 To NOAA 2002 as McArthur II (R 330), active
AGOS 8 Prevail Tacoma Boat Tacoma WA 410 1,600 224 4-Mar-86 Training ship (IX 537) 2003, active
AGOS 9 Assertive Tacoma Boat Tacoma WA 411 1,600 224 9-Sep-86 To NOAA 2004, to Seattle MA 2008
AGOS 10 Invincible Tacoma Boat Tacoma WA 412 1,600 224 30-Jan-87 Converted to T-AGM 24 2000, active
AGOS 11 Audacious Tacoma Boat Tacoma WA 448 1,600 224 12-Jun-89 To Portugal 1996 as Dom Carlos I (A 522), active
AGOS 12 Bold Tacoma Boat Tacoma WA 449 1,600 224 20-Oct-89 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-88 To NOAA 1992 as Oscar Elton Sette (R 335), active
AGOS 14 Worthy Halter Marine Moss Point MS M231 1,600 224 4-Apr-88 To US Army 1995 as WAGM
AGOS 15 Titan Halter Marine Moss Point MS M232 1,600 224 8-Mar-89 To NOAA 1993 as Ka'imimoana (R 333), active
AGOS 16 Capable Halter Marine Moss Point MS M233 1,600 224 9-Jun-89 To NOAA 2004 as Okeanos Explorer (R 337), active
AGOS 17 Tenacious Halter Marine Moss Point MS M234 1,600 224 29-Sep-89 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-90 To NOAA 1993 as Gordon Gunter (R 336), active
AGOS 19 Victorious McDermott  McDermott  279 3,100 235 13-Aug-91 Active
AGOS 20 Able McDermott  McDermott  287 3,100 235 22-Jul-92 Active
AGOS 21 Effective McDermott  McDermott  288 3,100 235 27-Jan-93 Active
AGOS 22 Loyal McDermott  McDermott  289 3,100 235 1-Jul-93 Active
AGOS 23 Impeccable Tampa Shipyards Tampa FL   2,800 281 13-Oct-00 Completed by Halter Marine, active
AGOS 24 Integrity Tampa Shipyards Tampa FL   2,800 281   Cancelled
AGOS 25-30   Tampa Shipyards Tampa FL   2,800 281   Cancelled