 Cousteau and the "Élie Monnier" then took part in the rescue of Professor Jacques Piccard's bathyscaphe, the FNRS-2, during the 1949 expedition to Dakar.Thanks to this rescue, the French Navy was able to reuse the sphere of the bathyscaphe to construct the FNRS-3.The adventures of this period are told in the two books "" (1953, by Cousteau and Dumas) and "Plongées sans câble" (1954, by Philippe Tailliez).