TNT equivalent
"L'Inflexible" uses basically the same design as the other "Redoutable"-class vessels, but has benefited from technological advances over its predecessors. The submarine uses the M4 missile, which carries 6 independent 150 kilotonnes of TNT equivalent nuclear warheads. Their range is reported to be over . The boat also has the capability of launching the SM39 Exocet anti-ship missile.