 In 1992, he was invited to Rio de Janeiro, Brazil, for the United Nations' International Conference on Environment and Development, and then he became a regular consultant for the UN and the World Bank.In 1995, he sued his son, who was advertising "Cousteau Fiji Islands Resort", to prevent him from using the Cousteau name for business purposes in the United States.On 11 January 1996, "Calypso" was accidentally rammed and sunk in the port of Singapore by a barge.