Step 1 : Introduction to the question "What was the name of the research ship used by French explorer Jacques Cousteau?"
Jacques Cousteau was a French undersea explorer, researcher, photographer and documentary host who invented diving and scuba devices, including the Aqua-Lung. He also conducted underwater expeditions and produced films and television series, including the Undersea World of Jacques Cousteau. In 1950, Jacques Cousteau leased a one-time British minesweeper and converted it into an oceanographic research vessel he named Calypso. In 1996, the Calypso sunk outside of Singapore.
