The USCG Local Notices to Mariners is updated weekly and is available for download in Portable Document File (PDF) Format. You may download the free Adobe Reader.

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ATON Datum Shift Information

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Please review the following USCG District boundary information.

• USCG District Boundaries.

More Notices to Mariners...

• The Notice to Mariners (NGA)
• Canadian Notice to Mariners (Notmar)

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