From the Civilopedea
A Coastal Fortress gives the city a naval bombardment defense of eight and a 50% defensive bonus against naval attacks.
The fortress automatically bombards passing enemy ships.
A Coastal Fortress gives the city a naval bombardment defense of eight and a 50% defensive bonus against naval attacks.
The fortress automatically bombards passing enemy ships.
From the Civ3edit Help File
Naval Power
Determines the naval power of the improvement/wonder. Can be used to create coastal fortresses that automatically attack enemy sea units.
Naval Bombard Defense
Determines the bombardment defense rating of the selected improvement/wonder versus naval units.
Naval Power
Determines the naval power of the improvement/wonder. Can be used to create coastal fortresses that automatically attack enemy sea units.
Naval Bombard Defense
Determines the bombardment defense rating of the selected improvement/wonder versus naval units.

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