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Warships hitpoints increased.
—In-game description

Armor Plating is a technology in Age of Empires III that can be researched at the Dock once the Commerce Age is reached. Once researched, it increases the hit points of warships by 50%.


This technology is extremely useful as most warships have a relatively low amount of hit points and are rather costly to produce. This allows them to last longer in fights and be easier to return to the dock for automatic repair.

However, it is relatively costly in gold, especially compared to the cost of a Frigate. Statistically, to get the equivalent value of 2,000 HP, it would require a Privateer shipment or an abnormally large amount of Caravels, or alternatively multiple Galleons to make the upgrade be cost effective. Thus is not likely to be efficient before the first Frigate is produced.

Shipping the British Card TEAM Cheap Docks halves the cost of this card, but the card itself is unlikely to be efficient due to the opportunity cost of a Shipment.

The AI never researches this technology, giving the player an edge in naval combat.

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Dock technologies in Age of Empires III
Gill Nets · Long Lines · Armor Plating · Carronade · Flag IroquoisDE.png Rawhide Covers* · Flag SiouxDE.png Flaming Arrows* · Percussion Lock · Flag AztecDE.png Cipactli Worship* · Ship's Howitzers
* introduced in The WarChiefs