DefenseLINK News
Press release "Navy to Christen New Class of Ocean Surveillance Ship".
Global Security
Overview of the T-AGOS 23 Impeccable class of ocean surveillance ships.
Military Sealift Command
Press release "USNS Impeccable Christened Nov. 1".
Naval Vessel Registrar
Brief fact sheet for USS Impeccable (AGOS-23).
NavSource Online
T-AGOS-23 Impeccable history, specifications, and images.