The Coast Guard is conducting an assessment of the shallow draft waterway systems, the fourth in a series of studies to determine the navigation requirements for mariners in the U.S. Marine Transportation System (MTS).The Waterways Analysis and Management System (WAMS) study will help the Coast Guard to determine the aids to navigation (ATON) requirements in the shallow draft waterway systems which includes all navigable waterways of the U.S. less than 12 feet.

The WAMS study is focused on providing consistent, programwide policy necessary to support Coast Guard district commanders in the execution and management of ATON services within the shallow draft waterway system. The shallow draft system is present in all nine Coast Guard districts. The recommendations will not determine what individual ATON to add, keep, or remove, but they may shape policy for the next generation waterway system management and design. All ATON activities remain under the purview of the local district commander.

The assessment is part of the Coast Guard’s effort to make U.S. navigable waterways safer, more efficient and resilient. Studies have been previously conducted of the Atlantic and Pacific seacoast systems along with the Western Rivers system. Future studies are planned to include the intracoastal waterways and deep draft waterway systems.

Waterway users, interested parties, and stakeholders are invited to provide comments or feedback via the tool posted at  This link will remain available until Nov. 1, 2020.

Further questions or comments may be emailed to [email protected] using the subject line: “Shallow Draft WAMS”.