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canal lock: side viewclick to hear

canal lock: side view upper gate lower gate upper level lock-chamber lower level flow

upper gate click to hear

Watertight door or pair of doors made of wood or metal that open when the water levels between the lock-chamber and the upper level are the same.

lower gate click to hear

Watertight door or pair of doors made of wood or metal that open when the water levels between the lock-chamber and the lower level are the same.

upper level click to hear

Part of the lock at the upstream end of the lock-chamber.

lock-chamber click to hear

Central part of the lock where the water level is raised and lowered depending on the heading of the ship.

lower level click to hear

Part of the lock at the downstream end of the lock-chamber.

flow click to hear

Natural current moving down the grade from upstream to downstream.