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AIS Vessel Transit Counts 2025

Published by Office for Coastal Management | National Oceanic and Atmospheric Administration, Department of Commerce | Catalog Last Checked: August 02, 2026 at 11:51 PM | Dataset Last Updated: May 18, 2026 at 12:00 AM
This dataset summarizes annual vessel transit counts. Transit counts show how many times vessels pass through a specific 100-meter by 100-meter geographic area. The automatic identification system (AIS) is a navigation safety device that transmits and monitors the location and characteristics of many vessels in U.S. and international waters in real time. In the U.S., the Coast Guard and industry collect AIS data, which can also be used for a variety of coastal planning purposes. NOAA and BOEM have worked jointly to add value and make available some of the most important historical records from the U.S. Coast Guard's national network of AIS receivers. This data set represents annual vessel transit counts summarized at a 100-meter by 100-meter geographic area. A single transit is counted each time a vessel track passes through, starts, or stops within a 100-meter grid cell.

Resources

5 resources available

  • https://ocmgeodatastor1.blob.core.windows.net/marinecadastre/ais/aistransit/ais-transit-count-2025.tif

    TIFF
  • https://marinecadastre.gov/data

    TEXT/HTML
  • GCMD Keyword Forum Page

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  • Full Metadata Record

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  • NOAA Office for Coastal Management Website

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