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Copper Bottoms
Etw military navy copper bottoms
Prerequisite Seasoning
Research Points Needed
Building Needed Naval Board
Leads To Improved Coppering
Stream Naval, Military
Effects
  • +5% Recruitment cost for all naval units
  • +10% top speed of ships in battle
  • +5% movement range for ships on the campaign map
Copper Bottoms are a Technology in Empire: Total War.

DescriptionEdit

Ships can be protected from fouling and the ravages of worms by covering them with copper sheeting below the waterline.

Wooden ships are a rich feast for many marine animals, and a home for all manner of weeds and barnacles. Over time, any hull becomes fouled when weeds and encrustations to the point that the ship's speed is compromised. Worse still, given time, worms will eat the planks of the ship to the point where its bottom literally falls out! Other than scraping a beached hull clean, there is no cure; worm eaten timbers have to be chopped out and replaced.

Coppering involves nailing or bolting thin sheets of metal over the whole of a ship's underside. The copper is toxic to worms and weeds, and greatly extends the working life of a ship, and improves its sea keeping qualities.

Historically, coppering was only a partial solution to the problem of fouling. It worked well in keeping the hull clean but, thanks to an electrolytic reaction with iron bolts used to hold the ship together, the bolts rotted away! The iron, copper, and seawater had created a battery, and the (unintentional) iron cathodes were damaged by the reaction.

General InformationEdit

Copper Bottoms is one of the few technologies that increases the money required to build and/or maintain military forces. In exchange, it significantly boosts ship movement range on the campaign map and, more importantly, their speed in battle. 

Empire: Total War Technology
Philosophy Abolition of SlaveryCitizenshipClassical EconomicsEmpiricismFree Trade DoctrineGovernment by ConsentJoint Stock CompaniesNational DebtPhysiocracyRights of ManSecular HumanismSeparation of PowersSocial ContractUtilitarianismWealth of Nations
Military AirgunsCadenced MarchingCanister ShotCarbinesCarcass ShotCarronadesCopper BottomsDiamond FormationEuropean DoctrineExplosive RocketsExplosive ShellsFire and AdvanceFire by RankFlintlock CannonsImproved CopperingImproved Grape ShotImproved GrenadesLight Infantry DoctrineLime Juice and SauerkrautLongitude WatchMachined RiflingMilitary SyllabusNaval Architecture AdvancesNaval Shore FacilitiesNew Model Bayonet DrillPercussion CapPercussion ShellsPlatoon FiringPlug BayonetQuicklime ShellsReformed Naval AdministrationReorganised ProcurementRifled CannonsRing BayonetScrew BreechSeasoningSextantSheet Lead CartridgesShortened CarbinesShrapnel ShotSocket BayonetSquare FormationTop GallantsWedge Formation
Industrial Advanced IrrigationBasic Steam PumpCoke Blast FurnaceCommon Land EnclosuresDivision of LabourFlying ShuttleFour-Field Crop RotationImproved Animal HusbandryMachine ToolsMass ProductionMeasuring ToolsPower LoomPuddling FurnacePunch-Card LoomSeed Planting DrillSelective BreedingSpinning JennySpinning MuleSteam EngineSteam-Pumped Land DrainageThreshing Machine
Warpath Campaign Mystic Call of the WildDreamwalkingRiding the WindsSpirit MedicineSpirit of the Forest
Warpath Campaign Military Ambush TacticsCannon CastingGun DealingImproved IronworkingIronworkingPowder MakingSharp ShootingWinter Clothes
Warpath Campaign Economy and Culture Improved FarmingImproved FishingMoney EconomyWritten LanguageHunting Techniques

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