USNS Persistent (T-AGOS-6) was a Stalwart-class Modified Tactical Auxiliary General Ocean Surveillance Ship of the United States Navy.

Stalwart-class ships were originally designed to collect underwater acoustical data in support of Cold War anti-submarine warfare operations in the 1980s.

Ex-USNS Persistent is now T/S State of Michigan, owned by the U.S. Department of Transportation's Maritime Administration and assigned to the Great Lakes Maritime Academy, Traverse City, Michigan.

This produced a total of 3,200 metric horsepower (3,200 shp; 2,400 kW) that drove two shafts.

[2] The Stalwart-class ocean surveillance ships had maximum speeds of 11 knots (20 km/h; 13 mph).