Production Methods/Naval BatteryNProduction MethodNaval Batteriesnaval_battery_maintenancein_game/common/building_types/coastal_forts.txt:76Definitionin_game/common/building_types/coastal_forts.txt:7677stone = 0.278firearms = 0.279cannons = 1.080tools = 0.581tar = 0.282category = building_maintenance