Clemenceau - class aircraft carrier The " Clemenceau " class aircraft carrier are a pair of aircraft carrier s which served in the French Navy from 1961 through 2000 , and of which one currently remains in active service with the Brazilian Navy as the " São Paulo " . The " Clemenceau " class was France ' s first successful aircraft carrier design after World War II and was the backbone of the French Fleet for the duration of its forty years of service . Background . By the early 1950s , the French Navy had in service a number of aircraft carriers , the most modern of which was " Arromanches " . However , all of them were small and increasingly incapable of operating modern aircraft , which were steadily increasing in size . To ensure French independence in defence matters , a new class of two modern fleet carriers was envisaged . Displacing just under 35 , 000 tons each , the new ships would be slightly smaller than the 43 , 000 ton Royal Navy ' s newly commissioned " Audacious " class ships , but they would be capable ships for their size built from scratch to take advantage of the latest ideas in aircraft carrier design , including angled flight deck , steam catapults and mirror landing aid , and would operate a brand new generation of French designed carrier based aircraft . The draft statute prepared by the Naval General Staff in 1949 asked four aircraft carriers of 20 , 000 tons to be available in two phases . At its meeting of 22 August 1949 , the Supreme Council of the Navy was even more ambitious where they asked six aircraft carrier fleet . On 15 July 1952 , the French Navy still wanted two to five with the French Union ( not available to the NATO ) . According to the RCM 12 , the final document of the Lisbon Conference of 1952 , France should make available NATO aircraft carrier in the D - day , two on day 30 , three on day 180 . But by 1953 , the Navy had to be satisfied with two aircraft carriers . The PA 54 Clemenceau , budgeted in 1953 , was delayed until November 1955 , the PA 55 Foch , budgeted for 1955 , was delayed until February 1957 . Between 1980 and 1981 , she underwent a study to certify the platform before catapulting aircraft carrying missiles , bombs , AM - 39 Exocet and tactical nuclear bombs . Like her sister ship the Clemenceau , the Foch underwent a modernization and refit , replacing 4 of her 8 100mm guns with 2 Crotale air - defense systems . Unlike the Clemenceau , the Foch in 1997 also received 2 Sadral launchers ( for 6 Mistral missiles each ) ; those launchers were purchased by France in 1994 . They would also have longer careers ( until 1998 and 2000 ) when compared with the Audacious class aircraft carrier s , which were withdrawn in 1972 and 1978 . The " Clemenceau " class aircraft carriers are of conventional CATOBAR design . The flight deck is 165 . 5m long by 29 . 5m wide ; the landing area is angled at 8 degrees off of the ship ' s axis . The forward aircraft elevator is to starboard , and the rear elevator is positioned on the deck edge to save hangar space . The forward of two 170 ft ( 52m ) catapults is to port on the bow , the aft catapult is on the angled landing deck . The hangar deck dimensions are 152m by 22 - 24m with 7m overhead . Air group . Designed from the outset as multi - role fleet carriers , the two " Clemenceau " class ships initially in 1961 had an air group with each of ten aircraft each of the IVM attack version and IVP reconnaissance version of the Dassault Etendard IV strike fighter , a squadron of up to eight Breguet Alizé aircraft were embarked for the antisubmarine warfare mission , and in the air - defense role a squadron of Sud Aviation Aquilon ( license - built De Havilland Sea Venom ) fighters . They were also used for French amphibious assault operations with up to 30 - 40 helicopters ( normal helicopter wing is 4 helicopters ) deployed ; just prior to the 1991 Gulf War as part of Operation Salamandre ( the air component of Operation Daguet ) , the Clemenceau ferried 30 Aerospatiale Gazelle s and 12 Aerospatiale SA 330 Puma s to Saudi Arabia . The planned size of the total air wing was originally 60 , but the increasing size of carrier - based aircraft in the late 1950s reduced that number to approximately 40 . The more capable , missile - armed Vought F - 8 Crusader was soon deployed , with a squadron of eight aircraft embarked , starting 2 years later from 1963 . The Crusader served with the 2 carriers until the Foch was decommissioned in 2000 . The Dassault Super Etendard entered service on both ships in 1978 . The Super Etendard could carry both the Exocet missile and the Air - Sol Moyenne Portee ( ASMP ) nuclear missile , giving these ships a stand - off nuclear strike ability lacking in the earlier Etendard IV ( equipped with free - fall nuclear bombs only ) . " Clemenceau " and " Foch " were modernized during September 1977 - November 1978 and July 1980 - August 1981 ( " Foch " ) . This mid - life upgrade cleared them for the new Super Etendard ( along with several other upgrades , like the SENIT C3 system ) . Then they had up to 40 aircraft : 10 F - 8FN , 15 - 16 Super Etendard and 3 - 4 Etendard IVP , 7 Alizé , 2 Super Frelon and 2 Alouette III . Their hangar measured 152 x 24 x 7 meters ( 3 , 648 square meters ) . The " Clemenceau " fuel depots were 1 , 200 mc ( JP5 ) and 400 mc ( AVGAS ) . " Foch " increased this amount up to 1 , 800 and 109 respectively . The Dassault Rafale was test flown from the Foch after deck modifications in 1992 and operated from this carrier after further 1995 - 6 deck modifications . Ships in class . The two vessels of the " Clemenceau " class are :