Calypso is a former British Royal Navy Minesweeper converted into a research vessel for the oceanography researcher Jacques-Yves Cousteau, equipped with a mobile laboratory for underwater field research. She was severely damaged in 1996, and is undergoing a complete refurbishment in 2009. The ship is named after the Greek mythological figure Calypso. Calypso was originally a wooden-hulled minesweeper built for the British Royal Navy by the Ballard Marine Railway Company of Seattle, Washington, USA. She was made from Oregon pine.