Visitors to the Preservation Society in Ocracoke, N.C., view a display featuring the U.S. Navy�s first submarine, Alligator, invented by Brutus de Villeroi, and built in Philadelphia in 1862.

Ocracoke, N.C. (Aug. 24, 2004) Visitors to the Preservation Society in Ocracoke, N.C., view a display featuring the U.S. Navys first submarine, Alligator, invented by Brutus de Villeroi, and built in Philadelphia in 1862. The National Oceanic and Atmospheric Administration (NOAA), with support from the Office of Naval Research (ONR) is conducting a week-long expedition off Cape Hatteras where the Civil War era vessel was lost during a fierce storm in 1863. U.S. Navy photo by Chief Journalist John F. Williams File# 040824-N-7676W-025