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Warships Broadside attack increased.
—In-game description

Percussion Lock is a technology in Age of Empires III that can be researched by European and Asian civilizations at the Dock once the Fortress Age is reached and Carronade is researched. Once researched, it increases the damage dealt by warships' Broadside Attack ability by 50%.

Strategy[]

Percussion Lock makes Frigates and Privateers even more dangerous, but is less useful for civilizations that tend to rely on Galleons, like the Spanish.

Dock technologies in Age of Empires III
SharedGill Nets · Long Lines · Armor Plating · Carronade · Percussion Lock · Ship's Howitzers
Native AmericansImproved Cordage*** · River Raids*** · Flag IroquoisDE Rawhide Covers · Flag SiouxDE Flaming Arrows · Flag AztecDE Cipactli Worship · Flag IncanDE Totora Reeds*
Africans**River Skirmishes · Heavy Riverboats
* introduced in the Definitive Edition   ** in The African Royals   *** in Knights of the Mediterranean
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