Bean,
I have to admit, my response to carriers is to build fighters. Why?
Yes, submarines are cheaper, slightly. However, their specialty is destroyed with a single destroyer so their cost effectiveness is somewhat limited.
Yes, planes are more expensive, slightly. However, after I sink your navy, I can use the planes to attack your land holdings and defend my infantry stacks. Submarines cannot do that. Thus, when your fleet is destroyed, what do my submarines get to do???
However, if Germany builds a carrier or two, I will most likely have to build a carrier with America (assuming the one at pearl was sunk, a good assumption I think.) That means I’ll have two, 1 UK, 1 US should be enough firepower with the 2 battleships, 3 destroyers, submarine and 8 transports to withstand a German attack. (Think unification of LA Fleet and Pacific/Indian Ocean Fleets around turn 3.)
Meanwhile, as I’ve been lambasted for stating before, during that time I have negated the German fleet by retaking Africa. I can get it faster then Japan can come to help Germany, meaning England’s not too far in the hole, especially if they end up with Norway to make up for India.