Casabianca was a Rubis-class nuclear attack submarine of the French Navy.

[1][3] The boat's underwater endurance is 60 days, dictated by food supplies.

The boat was designed to operate at seas 220 days per year, and was thus staffed by two crews that replaced each other from one patrol or exercise to the next.

[1] Casabianca's operational highlights include being the first French submarine to visit the naval base at Severomorsk, home of the Russian Northern Fleet, in 2003; and patrols in the Mediterranean and in the Indian Ocean as part of the fleet surrounding the aircraft carrier Charles de Gaulle, such as in 2007.

[4] During the Péan inter-allied maneuvers of 1998, Casabianca managed to "sink" USS Dwight D. Eisenhower and her Ticonderoga-class escort cruiser Anzio during a simulated attack.