OCM Metadata Library

    Office for Coastal Management, 2023: Nationwide Automatic Identification System 2022, https://www.fisheries.noaa.gov/inport/item/67336. GUID: gov.noaa.nmfs.inport:67336. Updated: February 6, 2023.

    Item Identification

    Item Identification
    Title: Nationwide Automatic Identification System 2022
    Status: Completed
    Publication Date: 2022-06-03
    Abstract: Automatic Identification Systems (AIS) are 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 management purposes. NOAA and BOEM have worked jointly to make available these data from the U.S. Coast Guards national network of AIS receivers. The original records were filtered to a one-minute frequency rate, and subset to depict the location and description of vessels broadcasting within the Exclusive Economic Zone.
    Purpose: To support ocean planning activities pursuant to the Executive Order Regarding the Ocean Policy to Advance the Economic, Security, and Environmental Interests of the United States, the Energy Policy Act, the Rivers and Harbors Act, and the Coastal Zone Management Act.
    Supplemental Information: Bureau Code: 006:48, Program Code: 006:055
    Data Quality
    Horizontal Positional Accuracy: Compiled to meet 10 meters horizontal accuracy at 95% confidence level
    Bias: Presence and absence of a record is dependent on the:
    a) Fixed and unpublished location and height of the receiving antenna relative to the dynamic position, antenna height and wattage of the transmitting vessel,
    b) Interference of the radio frequency transmission between the vessel and the receiving antenna, and the
    c) Interference in the collection of the record originating from the vessel
    Completeness Measure: a) Visual analysis of daily record byte count over a year long period
    b) Verbal and email communications with U.S. Coast Guard Navigation Center personnel
    Completeness Report: Records were received from all U.S. Coast Guard NAIS terrestrial receivers. The source data from the U.S. Coast Guard contained very few Type 2 messages for the period February 11 to March 22.
    Conceptual Consistency: These data are logically consistent

    Data Set Information

    Data Set Information
    Data Set Scope Code: Data Set
    Maintenance Frequency: None Planned
    Data Presentation Form: Map (digital)
    Entity Attribute Overview: MMIS, BaseDateTime, LAT, LON, SOG, COG, Heading, VesselName, IMO, CallSign, VesselType, Status, Length, Width, Draft, Cargo, TransceiverClass (see more here: https://coast.noaa.gov/data/marinecadastre/ais/data-dictionary.pdf)
    Distribution Liability: https://www.marinecadastre.gov/about/disclaimer.html
    Data Set Credit: U.S. Coast Guard Navigation Center, Bureau of Ocean Energy Management, NOAA Office for Coastal Management


    Extent Group 1 / Geographic Area 1
    W° Bound: -168
    E° Bound: -60
    N° Bound: 51.5
    S° Bound: 15
    Extent Group 1 / Time Frame 1
    Time Frame Type: Range
    Start: 2022-01-01
    End: 2022-12-31

    Spatial Information

    Coordinate Reference System
    CRS Type: Geographic 2D
    EPSG Code: EPSG:4269
    EPSG Name: NAD83
    Datum Name: North American Datum 1983
    Ellipsoid: GRS 1980
    Semimajor Axis: 6378137.0
    Flattening Ratio: 298.257222101
    Axis: Geodetic Latitude
    Order: 1
    Abbreviation: Lat
    Units: degree
    Orientation: north
    Axis: Geodetic Latitude
    Order: 1
    Abbreviation: Lat
    Units: degree
    Orientation: north
    Axis: Geodetic Longitude
    Order: 2
    Abbreviation: Lon
    Units: degree
    Orientation: east
    Axis: Geodetic Longitude
    Order: 2
    Abbreviation: Lon
    Units: degree
    Orientation: east



    Nationwide Automatic Identification SystemCC ID: 1173408
    Contact Role Type: Originator
    Contact Type: Organization
    Contact Name: U.S. Coast Guard Navigation Center
    Publish Date: 2022-01-01
    Extent Type: Range
    Extent Start Date/Time: 2022-01-01
    Extent End Date/Time: 2022-09-30
    Citation URL: https://www.navcen.uscg.gov/
    Source Contribution: Daily compressed log files containing original AIS messages in NMEA format for the months of January through March for the United States. Authoritative Vessel Identification Service (AVIS) Vessel Catalog.

    Process Steps

    Process Step 1
    Description: Filter the raw NMEA data to a one-minute sample rate and select a subset of fields using MarineCadastre.gov NMEA to SQL Server processing tools
    Load filtered records to a SQL Server database using MarineCadastre.gov NMEA to SQL Server processing tools
    Conduct quality and completeness check using logging results from the filter and loading process, and database record counts
    Update the IMO, CallSign, VesselName, Length, Width, VesselType, and Draft from US Coast Guard AVIS
    Added or updated the new vessel type code field to each record fragment that was found in the US Coast Guard AVIS
    Export records from the SQL Server database to CSV files organized day of the year using MarineCadastre.gov Filter and Export utilities
    Modify the format of the date and time values to a UTC string format during export
    Modify the format of the IMO vessel number to include the IMO prefix during export
    Trim white space from string attributes during export
    Replaced comma punctuation marks with a semi-colon in the vessel name or call sign field if present to improve CSV formatting during export
    Include a header record with descriptive text for each field during export
    Write extracted AIS data to an ASCII CSV format file using MarineCadastre.gov Filter and Export utilities
    Compress each ASCII CSV file
    Process Date/Time: 2021-07-01 00:00:00
    Source: Nationwide Automatic Identification System

    Catalog Details

    Catalog Details
    Catalog Item ID: 67336
    GUID: gov.noaa.nmfs.inport:67336
    Metadata Record Created By: Jesse Brass
    Metadata Record Created: 2022-06-03 13:07+0000
    Metadata Record Last Modified By: Jesse Brass
    Metadata Record Last Modified: 2023-02-06 19:17+0000
    Metadata Record Published: 2022-06-03
    Owner Org: OCM
    Metadata Publication Status: Published Externally
    Do Not Publish?: N
    Metadata Last Review Date: 2022-06-03
    Metadata Review Frequency: 1 Year
    Metadata Next Review Date: 2023-06-03