The USS Langley (CV-1/AV-3) was the United States Navy's first aircraft carrier, converted in 1920 from the collier USS Jupiter (AC-3), the first electrically propelled ship of the United States Navy. After yet another conversion, from carrier to seaplane tender, she fought in World War II and was so damaged by Japanese bombing attacks that she was sunk by her escorts on 27 February, 1942. The Langley was named after Samuel Pierpont Langley, an American pioneer in aircraft development.