Submarine - in the Industrial Age,
you can upgrade your Fireships to this even more deadly Submarine. The Submarine
possesses all the strengths and weaknesses of the Fire Raft/Fireship line (cheap
and deadly, but poor target aquisition), with the added value of being a ranged
weapon. It also benefits from being hidden.
Submarines are not, however, permanently invisible. They are spotted whenever they
fire, and can also be spotted by any "detector" units or structures, which includes
light ships (such as the later-game Destroyers and Cruisers),
Helicopters, Scouts, and Observation
Towers. In the late game, upgraded Towers dot the fashionably well-defended coast
as Sub killers.
The Dock. Home
of the Submarine, as well as the complete line of Heavy and Light Warships, and
Fishermen. Fishermen can be a handy way to boost your Food gather rate when your
Cities hold their maximum allotment of farms. Submarines are an effective way of
reducing your opponent's fishermen's gather rate.