Actually, has it ever been shown that Airships were ever that good historically?
I think he wanted to use manpower. The only trouble is that converting any physical motion to generate enough energy for reasonable flight is...difficult.
I spent some time looking at this a while back. Their effective use against military targets as anything more than a recon platform was almost nil.
In the first world war they were used primarily as a primitive form of strategic bomber. They attacked cities, not military targets per se; and even then they were minimally successful in terms of the number of casualties inflicted (something like 600 killed in the entire war). They did, however, provoke a good deal of consternation among the civilian population.
In the early days of the second world war, the US used them as recon platforms off the eastern seaboard to discourage u-boat attacks. While some of them were armed, I've yet to find a single documented instance of a successful attack by an airship against a naval unit of any kind (as opposed to operating as a recon platform that vectored in attacks from surface units or fixed wing aircraft).
In my opinion, giving them the ability to damage military units at all is entirely unfounded; and the bonus against naval units is downright silly. It just never happened.
Stealth is NOT useless for ships, even if the enemy already knows where you are. Their advantages in combat come when they are attacked by radar-guided weaponry. Since their radar cross section would be so low, incoming warhead guidance systems would be significantly more susceptible to spoofing countermeasures. Perhaps CIV IV could better simulate this by giving them better bombardment resistance versus cruise missiles.
Also I completely agree with the fact that airships have been badly implemented in the game. Perhaps the designers thought that if they couldn't do any attacking then no one would bother to build them. They make great recon platforms, though!
I like airships.
They only come "early" if you bee-line for Physics. I normally get them around 1750 AD (Prince, Epic). The Montgolfiers were around then.
Gods my come and go, but the Empire of Civ is eternal.

Pretty much impossible.....
I'd be happy if they were just an upgrade for explorers, with no offensive capabillities. I could see them giving siege & ships a first strike chance in the yellow recon zone to account for early enemy detection and accurate artillery spotting.
That's an excellent idea. Because it solves the problem of explorers you have to disband. Anyway they should be upgradeable to bombers afterwards. And 1 FS chance, that's almost no difference, I would go for 1-2 FS.
that's not your opinion, that's a fact.In my opinion, giving them the ability to damage military units at all is entirely unfounded; and the bonus against naval units is downright silly. It just never happened.
that's not your opinion, that's a fact.
in my first BTS game, i lost a _destroyer_ fleet after preliminary airship raids.
the mere thought of defenseless destroyer vessels getting sniped by evil high-precision airships is baloney.
as has been stated, the things were good enough to hit a metropolis when the wind was right, but they never bombed any ships.
Ummm... you impliment them properly into the game by changing the pre-req from Physics alone (which you can get in the middle ages) to Physics + Combustion which makes them come in the late industrial age, and only ONE TECH away from FLIGHT (which provides the obvious counter, the fighter)... if you want to further make it realistic, add OIL as a pre-req too. You'll never see airships in the middle ages again (well, unless the AI is waaaay ahead of you in research, but then you have bigger problems then airships).Agreed. I think I'm gonna remove them completely until something is thought out to implement them properly into the game.