Keywords: USNS Vanguard as Navigational Test Ship.jpg en USNS Vanguard T-AG-194 reconfigured for testing Navy submarine navigation systems http //www navsource org/archives/09/53/5319 htm http //www navsource org/archives/09/53/09531903 jpg direct link U S Navy Public domain PD-USGov-Military-Navy USNS Vanguard T-AG-194 |