pm575, no one denies that submarines are not a threat but that's why you have ASW, Zig Zag plans, oh, & the ability to ultimately move the "airfield" if necessary. Factor in the fact that not many nations actually have submarines & even fewer can use them effectively and a Carrier remains VFM. Remember,too, that as the RAF so often reminds us all, an airfield can be bombed so are not invulnerable (or were the Port Stanley raids a
PR/ political stunt in 1982 after all?)