Age of Empires Series Wiki

Boats gather Food from Fish and Coin from Whales faster.
—In-game description

Long Lines is a technology in Age of Empires III that can be researched at the Dock once the Commerce Age is researched and Gill Nets is researched. Once researched, it increases the gather rate of Fishing Boats, Caravels/Galleys/War Junks/Fune, Canoes, War Canoes, Tlaloc Canoes, and Marathan Catamarans by 30%.

Note: All canoes and the Marathan Catamaran have a base gather rate 2.5x slower than other vessels. See Food and Coin for exact totals.
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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