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Short Citation:
Office for Coastal Management, 2023: AIS Vessel Transit Counts 2016,

Item Identification

Title: AIS Vessel Transit Counts 2016
Status: Completed
Publication Date: 2018-12-12

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 planning purposes. NOAA and BOEM have worked jointly to re-task and make available some of the most important records from the U.S. Coast Guard's national network of AIS receivers. This dataset represents annual vessel transit counts summarized at a 100 m by 100 m geographic area. A single transit is counted each time a vessel track passes through, starts, or stops within a 100 m grid cell.


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.

Other Citation Details:

Design, development, and processing provided by: The Baldwin Group Inc. and RPS Group Inc.

Supplemental Information:

Bureau Code: 006:48, Program Code: 006:055


Theme Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Science Keywords
ISO 19115 Topic Category
ISO 19115 Topic Category
ISO 19115 Topic Category
ISO 19115 Topic Category
None coastal zone management
None Military
None ocean planning
None planning

Spatial Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Location Keywords
None Exclusive Economic Zone
None Outer Continental Shelf
None Territorial Sea
None United States of America

Physical Location

Organization: Office for Coastal Management
City: Charleston
State/Province: SC

Data Set Information

Data Set Scope Code: Data Set
Maintenance Frequency: None Planned
Data Presentation Form: Map (digital)
Distribution Liability:

Data Set Credit: U.S. Coast Guard Navigation Center, NOAA Office for Coastal Management, Bureau of Ocean Energy Management

Support Roles

Point of Contact

CC ID: 802226
Date Effective From: 2018
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address:
Phone: (843) 740-1202


Currentness Reference: Publication Date

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 802223
W° Bound: -132
E° Bound: -60
N° Bound: 51.5
S° Bound: 10.7

Extent Group 1 / Time Frame 1

CC ID: 802250
Time Frame Type: Range
Start: 2016-01-01
End: 2016-12-31

Access Information

Security Class: Unclassified
Data Access Constraints:


Data Use Constraints:

For coastal and ocean planning.

Distribution Information

Distribution 1

CC ID: 1121559
Download URL:
Description: Data Registry

Distribution 2

CC ID: 802231
Download URL:

Data Quality


Content was acquired from original sources – no additional testing was done to cross reference or confirm otherwise the field or geometry values from other sources.

Horizontal Positional Accuracy:

Maximum scale of intended use is 1:80,000. Positional accuracy reflects the specifications and methods of the original data producer and has not been modified for the generation of this product.

Completeness Report:

All known records acquired from the Nationwide Automatic Identification System which includes approximately 58 U.S. ports and 11 coastal areas out to 24 nautical miles offshore. For further information on vessel reporting requirements and participation in the AIS, see carriage requirements in the Code of Federal Regulations, Title 33. Significant null values exist in some fields principally as a result of vessel operator practices.

Conceptual Consistency:

Tested through visual inspection and through the analysis of summary statistics on field values.



AIS Vessel Tracks 2016

CC ID: 802237
Publish Date: 2016-12-31
Citation URL:
Citation URL Name: Source Online Linkage
Citation URL Description:

URL where the source data were originally accessed.

Source Contribution:

Annual vessel tracks built using the Track Builder Pro 1.0 tool with time and distance parameters of 30 minutes and 1 nm. Vessel type definitions derived from the original NMEA record and the Authoritative Vessel Identification Service (AVIS) Vessel Catalog

Process Steps

Process Step 1

CC ID: 802239

1. Select tracks for each vessel type from the 2016 AIS Vessel Tracks geodatabase by groups as defined in the AIS Vessel Type and Group Codes, Marine Cadastre 2018-05-23.

2. Calculate transit count grids using the AIS Vessel Transit Counter tool for each month of tracks and for each ocean basin.

3. Merge monthly transit count grids into an annual transit count grid.

Process Date/Time: 2018-01-02 00:00:00
Source: AIS Vessel Tracks 2016

Process Step 2

CC ID: 802386

1. Merge all 4 ocean basin/regional rasters into one raster using the mosaic to new raster tool.

Process Date/Time: 2018-11-20 00:00:00
Process Contact: NOAA Office for Coastal Management (NOAA/OCM)
Phone (Voice): (843) 740-1202
Email Address:

Catalog Details

Catalog Item ID: 54957
GUID: gov.noaa.nmfs.inport:54957
Metadata Record Created By: Anna Verrill
Metadata Record Created: 2018-11-27 16:39+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2023-05-30 18:09+0000
Metadata Record Published: 2019-01-24
Owner Org: OCM
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2019-01-24
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2020-01-24