The NOAA chart number, current edition number, current new edition date, and NOAA chart name will be displayed on the top of each chart updates search results page.
This column indicates the charting action to be taken to update that specific feature on your NOAA chart. There are only five potential actions, Add, Delete, Relocate, Change and Substitute. If the action field contains an annotation (2) or (3), this indicates that this chart update plots on more than one panel on the same NOAA chart.
This column indicates either the name of the aid to navigation or the feature being acted upon. In cases where the chart update affects a NOAA channel depth tabulation or a NOAA chartlet, there will be a hyper-link to a .gif image of that tabulation or chartlet for viewing and download.
This column indicates the charting label or charting action description that needs to be made to the NOAA chart for the specific chart update feature. For example, an aid to navigation charting label characteristics, or a description of hazard to navigation. This is the charting label after the update is made.
This column indicates the published latitude out to three decimal places. This is the latitude after the update is made.
This column indicates the published longitude out to three decimal places. This is the longitude after the update is made.
This column indicates the USCG LNM, NGA NM or CNM thatthe chart correction was published in, and the USCG District where the feature is located.NOAA cartographers have evaluated and applied this information to the nautical chart.In cases where the phrase "Not Yet Published" is listed for the feature, this indicatesthat the chart correction was identified by NOAA, but has not yet been published in a USCGLNM or NGA NM. In cases where the phrase "Not Published" is listed for the feature, thisindicates that the chart correction was not published in a Notice to Mariners. In caseswhere the phrase "Unknown" is listed for the feature, this indicates that publishing information for this chart correction isn't available.
About half of the charts consists of a single panel - The Main Panel. The other half also include supplemental panels - Insets, Extensions, etc. All the different types of panels are known as "kapps" and each has a unique kapp number.
This is the unique numbering for the chart panels that is used for the Raster Navigational Charts in BSB format.
This column indicates when the correction was made available on the Raster Navigational Charts that are available
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At the bottom of each chart update data search return page there is the option to view chart updates back to several previous chart editions. Click on the hyper-link for the chart edition you are interested in and view the results. There is a hyper-link if you want to download a tab delimited text file of the listing. The text file includes three additional columns: Chart Number, Latitude Decimal Degrees and Longitude Decimal Degress. Be sure to save the file as txt.