 In 1762 he was given a role in the military geographers' department and at this time was also put in charge of educating the Dauphin's children in naval matters, contributing to the future Louis XVI's interest in the sea.In 1766, he designed the yacht "Aurore" for a scientific expedition led by Courtanvaux.Ozanne retired in 1791, living in poverty until his death in Paris aged 82.