French submarine Eurydice (S644)

Eurydice was a French submarine, one of eleven of the Daphné-class submarine.

On 4 March 1970, while Eurydice was submerged under calm seas off Cape Camarat in the Mediterranean Sea 35 nmi east of Toulon, France, a geophysical laboratory picked up the shock waves of an underwater explosion. French and Italian search teams found an oil slick and a few bits of debris, including a part that bore the name Eurydice. The United States Navy oceanographic research ship USNS Mizar (T-AGOR-11) also took part in the search and on 22 April 1970 discovered several large pieces of wreckage off Cape Camarat near Saint-Tropez at depths ranging from 600 to 1,100 m.

The cause of the explosion was never determined. All 57 crew were lost.