Nautical Charts & Pubs  
  Nautical Charts & Products  
     •   Print-on-Demand Charts (POD)  
     •   PDF Nautical Charts  
     •   Raster Navigational Charts: NOAA RNC®  
     •   Electronic Navigational Charts: NOAA ENC®  
     •   BookletChart™  
     •   Chart Updates (LNM and NM Corrections)  
  Nautical Charting Publications  
     •   United States Coast Pilot®  
     •   U.S. Chart No. 1  
     •   Chart Catalogs  
     •   Dates of Latest Editions (DOLE)  
     •   Upcoming New Editions  
  Nautical Charting Utilities  
     •   NOAA's Online Chart Viewer  
     •   NOAA ENC® Online  
  Historical Products  
     •   Historical Maps and Charts  
     •   Historical Coast Pilots  
  Learn About Charting Products  
     •   Obtain Charting Products  
     •   How Publications are Updated  
     •   Differences Between Maps & Charts  
     •   Learn About Nautical Charts  
     •   DGPS & Your Chart  
     •   Differences Between NM and LNM  
     •   Differences Between RNCs and ENCs  
     •   Differences Between NOAA ENC® and DNC®  
     •   Differences Between ENC and ENC®Direct to GIS  
  Data Portals  
     •   Tides and Currents (General)  
     •   nowCOAST: Real-Time Coastal Data Map Portal  
     •   Physical Oceanographic Real-Time System (PORTS)  
     •   Nautical Charting Links  
     •   Chart Carriage Requirements  
     •   Report a Charting Discrepancy  
     •   Chart Inquiries (questions/comments)  
     •   Cartographic Automation  

POD Charts "Corrected Through" Dates

Coast Survey reviews charts weekly, and updates the charts with critical corrections. You can see how current your chart is by looking at the chart’s lower left corner. The “corrected through” and “last correction” dates give you the information about the chart’s updates.

When was the chart updated?

The “Last Correction” tells you the effective date of the chart. For instance, “Last Correction: 1/23/2014” means that we have incorporated all chart changes up until January 23.

What information has been included in this version of the chart?

“Cleared through” means that our cartographers have checked the specified Local Notices to Mariners and Notices to Mariners, and have either made appropriate changes to the chart or “cleared” the LNMs and NMs as having no importance to the chart.

You should continually check LNMs and NMs issued after the dates specified on your chart, and manually apply any changes. If you prefer not to make manual updates, you should obtain the latest chart.

User Survey  | Privacy Policy  |  Disclaimer  |  NOAA's National Ocean Service  |  NOAA  |  U.S. Department of Commerce 
Web site owner: NOAA Office of Coast Survey