@DarthMaximus:
Any serious threat (ie a large sub attack force) can be sunk before it even reaches your fleet since your ftrs can flyout 3 and be picked up by your AC’s for the 4th move.
So let us say that I have a LARGE sub attack force, call it 9 subs. You have 2 carriers and 4 fighters. (Both fleets cost 72 IPC).
You fly your 4 fighters out and hose 2 subs. Then you fly back to your carriers that are in range of my subs. Then my 7 subs attack, get sub shots on both carriers, kill the carriers, and I lose 2 more subs to fighter fire before I submerge. Your fighters splash into the water. I have 5 subs left.
Granted, that is taking things hella out of context. But that goes to my point that you should build to counter what your opponent builds.
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As rjclayton wrote, navies are pretty much for transporting cost-effective ground units around. That is a pretty damn good point. It is also the reason why you WILL want to have transports as fodder rather than subs a lot of the time.
A sub is like “I’m going to mess with your navy. But I’m not going to mess with ANYTHING else. I’m not going to mess with your ground units, or your air units. Nope, Imma just sit here in the sea and look mean.”
A transport is like “IM IN UR FACE SUCKA! NOW WAT?! HAHAHA!”
True, a sub has an attack of 2, and a transport has no attack. But try using a sub to invade a land territory. Doesn’t work.
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Basically, if you anticipate serious naval engagements, you DO NOT NEED ANY DESTROYERS, so long as you have a hell of a lot of subs and a few carriers. If your opponent attacks you with mass subs, your subs get to fire back before you take them as casaulties (so it’s LIKE you had a destroyer, sort of, because you’ll still get to fire with all your defenders. This assumes you have PLENTY of subs of course). If your opponent attacks you with navy and air, your subs kill his naval units. If your opponent attacks you with JUST air, your subs suck, but then, your carriers should be able to sink lots of enemy fighters, and the equation is - each loaded carrier costs 36 IPC to produce, and defense value total is 11. Your opponent’s fighters cost 10 IPC each with attack value 3. But every time your opponent kills something, it’s an 8 IPC sub (since you can take subs as casualties). You, on the other hand, are killing a 10 IPC fighter or 15 IPC bomber every time you fire. A couple of loaded carriers plus sub fodder will stand up to a lot of punishment from air, after which your opponent’s air is all blown up, and you will probably still have those carriers to retreat with.