Maritime Safety Information Products

To start: on the Chart, mouse over the pancake menu (☰) and select the layers you wish to view. Click here for the User Guide. Click here for the Weekly LNM Snapshots.

Note: Only waterways with data are displayed.

Local Notice to Mariners Prefaces

Light List Prefaces

Light List Geojson Files

LNM Geojson Files

Discrepant Federal Aids_1.geojson
Discrepant Federal Aids_2.geojson
Discrepant Federal Aids_3.geojson
Discrepant Federal Aids Corrected_1.geojson
Discrepant Private Aids_1.geojson
Discrepant Private Aids_2.geojson
Discrepant Private Aids_3.geojson
Discrepant Private Aids Corrected_1.geojson
Temporary Changes_1.geojson
Temporary Changes Corrected_1.geojson
Bridges_1.geojson
Bridges Line_1.geojson
Bridges Polygon_1.geojson
Miscellaneous_1.geojson
Miscellaneous Line_1.geojson
Miscellaneous Polygon_1.geojson
Marine Safety Information Bulletin_1.geojson
Marine Safety Information Bulletin Line_1.geojson
Marine Safety Information Bulletin Polygon_1.geojson
Marine Events_1.geojson
Marine Events Line_1.geojson
Marine Events Polygon_1.geojson
Hazards to Navigation_1.geojson
Hazards to Navigation Line_1.geojson
Hazards to Navigation Polygon_1.geojson
TESS Advisory_1.geojson
TESS Advisory Line_1.geojson
TESS Advisory Polygon_1.geojson
Naval Activity_1.geojson
Naval Activity Line_1.geojson
Naval Activity Polygon_1.geojson
Safety Zones_1.geojson
Safety Zones Line_1.geojson
Safety Zones Polygon_1.geojson
Changes_1.geojson
Advance Notice of Change_1.geojson
Proposed Notice of Change_1.geojson
Marine Construction_1.geojson
Marine Construction Line_1.geojson
Marine Construction Polygon_1.geojson

U.S. Coast Guard Navigation Center - Addenda to Local Notice to Mariners (LNM)

The U.S. Coast Guard Navigation Center announces Addenda to the Local Notice to Mariners (LNM), which contains important updates to navigational safety and maritime information published in the most recent LNM. Mariners should review this addenda in conjunction with the current LNM to ensure compliance with all applicable navigation requirements and regulations.