The Coast Guard recently updated the user interface to the Local Notice to Mariners (LNM) and Light List (LL) App in an effort to modernize and improve the accessibility, accuracy and overall user experience for mariners.

Beginning in January 2025, the National Oceanic and Atmospheric Administration’s Office of Coast Survey will discontinue the production of paper charts.

The modernized Local Notice to Mariners creates access to the most up to date Marine Safety Information available, in a customizable, chart-based and interactive format,” said Cmdr. Nicholas Seniuk, Waterways Management Branch Chief for the Seventh Coast Guard District. “The data can be presented graphically on the interactive map viewer, in tabular format on the Coast Guard Navigation Center website, as a document, or rendered within certain geospatial information software.”

Key changes for Mariners:

Transition from Paper Charts: As NOAA phases out paper charts, the Coast Guard is adopting official waterway names for navigation references.Interactive Maps: LNMs and Light Lists are now displayed on a user-friendly, interactive map.Real-time Updates: LNMs update every 15 minutes, and Light Lists every 24 hours.Customizable Access: Users can create and print lists tailored to their voyages or download the entire LNM.

LINK TO THE USCG Navigation Center