Engines (#1124): surely the entire history of air warfare has shown that carriers, despite their mobility, are quite vulnerable to air attack (esp Midway but also Coral Sea, Leyte Gulf), not to mention submarines - and that airfields, despite their immobility, are rather difficult to permanently disable (Battle of Britain, Stanley 1982, Iraq 1991)... just saying.
Last edited by Easy Street; 18th Jun 2012 at 00:24.