The Astrée was an Aurore class submarine

Aurore class submarine

The Aurore class was a class of coastal submarines designed for the French Navy. Some of the ships were captured by Nazi Germany after the Fall of France, most of them in an unfinished state....

 of the French navy

French Navy

The French Navy, officially the Marine nationale and often called La Royale is the maritime arm of the French military. It includes a full range of fighting vessels, from patrol boats to a nuclear powered aircraft carrier and 10 nuclear-powered submarines, four of which are capable of launching...

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Still incomplete, she was captured by the Germans in June 1940. She was renamed UF-3 on 13 May 1941, but never completed during the German occupation of France.

She was recaptured and completed under her original name. The Astrée was taken out of service in 1962, and striken on 27 November 1965 as the Q404.