"Ship armor upgrade"

OldGeorge	Among the items listed in the Fertilizer box on the Tech Tree is "Renaissance Age Ship Armor Upgrade". Where do I go to get which ships armored how? Thanks for all good answers. 9 years ago Quote	9 years ago Quote

berserker	I'ts in the sailing workshop unlocked by the same tech. 9 years ago Quote	9 years ago Quote

OldGeorge	Which is labeled a building, and so should have been obvious. Color me embarrassed! 9 years ago Quote	9 years ago Quote