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Lightering Zones

Published by Office for Coastal Management | National Oceanic and Atmospheric Administration, Department of Commerce | Metadata Last Checked: December 19, 2025 | Last Modified: 2022-02-10T00:00:00.000+00:00
These data represent federal and state lightering zones within U.S. waters. Lightering is the transfer of a cargo of oil in bulk from one oil tanker less than 150 gross tons to another oil tanker less than 150 gross tons, or a cargo of hazardous material in bulk from one vessel to another. Lightering is often used to reduce vessel draft prior to entering a port. A lightering zone is an area were lightering is either designated, prohibited, has traditionally occurred, or where restrictions are in place to ensure or constrain lightering activities.

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