What does Couronian Shipyards do in AoE3?

Ship: train time −20%; Fishing Boat: train time −15%; Caravel: Coin cost −25%; Galleon: Coin cost −25%. The game says: "Polish warships cost less coin and all ships train faster, especially Fishing Boats."

Home City card

Couronian Shipyards

Couronian Shipyards (tech ID DEHCCouronianShipyards) is a Home City card in AoE3: Definitive Edition 100.19.18309, in the decks of 1 civilization, sent from the Colonial Age. Effect: Ship: train time −20%; Fishing Boat: train time −15%; Caravel: Coin cost −25%; Galleon: Coin cost −25%.

Quick answers (3)

Which civilizations have the Couronian Shipyards card?: Poles.
What does Couronian Shipyards do in AoE3?: Ship: train time −20%; Fishing Boat: train time −15%; Caravel: Coin cost −25%; Galleon: Coin cost −25%. The game says: "Polish warships cost less coin and all ships train faster, especially Fishing Boats."
What is the tech ID of Couronian Shipyards?: DEHCCouronianShipyards.

Polish warships cost less coin and all ships train faster, especially Fishing Boats.

What it does

Ship: train time −20%
Fishing Boat: train time −15%
Caravel: Coin cost −25%
Galleon: Coin cost −25%
Monitor: Coin cost −20%
Frigate: Coin cost −20%

Cost: 1
Sent from: II
Times it can be sent: 1
Game ID: DEHCCouronianShipyards

In these decks

PolesII×1

Source: techtreey.xml and the Home City files, AoE3: DE 100.19.18309 (build 25040513).