Where do I find Publication Data Update (PDU) files?
Publication Data Update files, or “PDU” files, are found in the Publications section of this Web site, on the same page as the type of publication to which they apply. For instance, PDU files for Sailing Directions Enroute are accessed from the Sailing Directions Enroute page. If no PDU file is listed for a specific publication, then a PDU file has not yet been issued for that publication.
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