Dry Dock is a technology in Age of Empires II available at the Dock upon reaching the Imperial Age. Once researched, it increases ship speed by 15% as well as the capacity of Transport Ships by +10 (for a total of 20).
Changelog
The Age of Kings
Definitive Edition
Civilization bonuses
History
Before the Definitive Edition, Dry Dock does not improve the efficiency of Trade Cogs, as they are affected by the speed increase, but earn less gold per trip to compensate this effect, so that the gather rate remains the same in total. In the Definitive Edition, this was changed, so that Dry Dock no longer reduces gold per trip.
Dry Dock is available to all civilizations except for the Goths, Mongols, and Teutons.
Changelog 
Edit
The Age of Kings Edit
- Dry Dock reduces gold per trip for Trade Cogs.
Definitive Edition Edit
- Dry Dock no longer reduces gold per trip for Trade Cogs.
Civilization bonuses Edit
- Chinese: Researching Dry Dock is 20% cheaper.
- Italians: Researching Dry Dock is 50% cheaper.
- Persians: Researching Dry Dock is 20% faster.
History Edit
“Ships needing extensive repairs were sailed into a new structure called a dry dock from which the water could be pumped. This left the ship dry and accessible to workmen from all directions.”
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