"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 Étendard (along with several other upgrades, like the SENIT C3 system). Then they had up to 40 aircraft: 10 F-8FN, 15–16 Super Étendard and 3–4 Étendard IVP, 7 Alizé, 2 Super Frelon and 2 Alouette III. Their hangar measured 152 × 24 × 7 meters (3,648 square meters). "Clemenceau"s fuel depots were 1,200 mc (JP5) and 400 mc (AVGAS). "Foch" increased this amount up to 1,800 and 109 respectively.