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.

USNS Contender (T-AGOS-2) was a Stalwart-class Modified Tactical Auxiliary General Ocean Surveillance Ship of the United States Navy. Now known as the T/S General Rudder, the ship serves as the primary training vessel of Texas A&M Maritime Academy. Texas A&M has operated the vessel since 2012.