Stalwart-class ocean surveillance ship

This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: "Stalwart-class ocean surveillance ship" – news · newspapers · books · scholar · JSTOR (January 2013) (Learn how and when to remove this message)

Stalwart-class

USNS Stalwart
Class overview
Builders	1–12: Tacoma Boatbuilding Company, Tacoma, Washington 13–18: VT Halter Marine, Inc., Moss Point, Mississippi
Operators	United States  Portugal  New Zealand
Preceded by	None
Succeeded by	Victorious class
In service	April 12, 1984
Completed	23
Active	5 not stricken by Naval Vessel Register
General characteristics
Displacement	1,565 t.(lt) 2,535 t.(fl)
Length	224 ft (68 m)
Beam	43 ft (13 m)
Draft	15 ft (4.6 m)
Propulsion	diesel-electric, two shafts, 1,600 hp (1,200 kW)
Speed	11 knots (20 km/h; 13 mph)
Complement	36

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]