Atalante (Q162) was an Argonaute-class submarine in commission in the French Navy from 1934 to 1944. She saw service in World War II, first on the side of the Allies from September 1939 to June 1940, then in the forces of Vichy France until November 1942, when she became part of the Free French Naval Forces.
Not who you're looking for? Others named Atalante: 1915 Amphitrite-class submarine