Hunt for the 'Alligator'. View of the Geometrics G-882 Magnetometer, one of the main survey tools being used in a high-tech underwater search for the US Navy's first submarine the 'Alligator'. The National Oceanic and Atmospheric Administration (NOAA), with support from the Office of Naval Research (ONR) are conducting a week-long expedition off Cape Hatteras, USA, where the Civil War era vessel was lost during a fierce storm in 1863. Photographed on 22nd August 2004.