Prométhée (Q153) was a Redoutable-class submarine of the French Navy, launched in 1930 at Cherbourg. On 7 July 1932, while sailing on the surface during sea trials, she suddenly sank off Cape Lévi, Manche. 62 of her 69 crew were lost with her, causing an outpouring of grief in France. The wreck was located the following day, but attempts to rescue any survivors and refloat the vessel were in vain. Survivors' statements indicated that the sinking was likely due to a sudden opening of the diving purges.