AoE3 DatabaseAoE3: DE 100.19.18309 · read from the game files · unofficial

Technology

Improved Cordage

Improved Cordage (tech ID DEWarCanoeHitpoints) is a technology in AoE3: Definitive Edition 100.19.18309 costing 350 wood, 350 coin, 60 s to research at the Dock and Port. Effect: War Canoe: hit points +25%; Tlaloc Canoe: hit points +25%; Chincha Raft: hit points +25%.

Quick answers (3)
How much does Improved Cordage cost in AoE3?
350 wood, 350 coin, 60 seconds (AoE3: Definitive Edition 100.19.18309).
What does Improved Cordage do in AoE3?
War Canoe: hit points +25%; Tlaloc Canoe: hit points +25%; Chincha Raft: hit points +25%. The game says: "American cording techniques improve the hitpoints of War Canoes, Tlaloc Canoes, and Chincha Rafts."
What is the tech ID of Improved Cordage?
DEWarCanoeHitpoints.

American cording techniques improve the hitpoints of War Canoes, Tlaloc Canoes, and Chincha Rafts.

What it does

Cost
Coin350Wood350
Research time
60 s
Game ID
DEWarCanoeHitpoints

Researched at

Civilizations

IncaAztecsHaudenosauneeLakota

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