From AIS to VTR: A Cruise through the Portal’s Fishing Data
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The Portal houses over 1,000 map layers illustrating commercial fishing along the East Coast. The Mid-Atlantic Regional Council on the Ocean (MARCO) has added much of this data in consultation with industry members, who have helped make the Portal’s maps more accurate, timely and informative for ocean management deliberations.

In this edition of Ocean Stories, we’ll provide a tour of some of the most important and frequently consulted fishing data products available on the site.


Squid 2015-2016

Vessel Monitoring System (VMS) Data

The federal vessel monitoring system (VMS) is used by the National Oceanic and Atmospheric Administration’s (NOAA) enforcement program to electronically monitor the location and movement of commercial fishing vessels. Certain vessels are required to carry transponders that signal their position to satellites around the clock, helping the agency enforce compliance with regional fishing quotas and environmental laws. The data produced has also been used to create insightful maps showing fishing activity from the Gulf of Maine to Cape Hatteras.

The Portal’s VMS maps were created by averaging this locational data to show where vessels spent the most time in windows of between two and four years. The maps categorize vessels by catch type, with maps available for the herring, monkfish, multispecies (groundfish), pelagic fish, scallop, squid, and surfclam/ocean quahog fisheries. The map colors run from reds that indicate where the highest levels of vessel activity was found to cool blues that indicate low activity.

Users can choose whether to view maps showing all vessel travel in a given period or only low-speed travel. The Squid 2015-2016 map above presents users a full view of where all vessel traffic, including high-speed transit to fishing grounds, took place.

Now view the data from the same time window, but only for travel under 4 knots. The lower-speed maps filter out the areas where the vessels were in transit and show only where fishing activity likely took place.


Gillnet 2011-2015

Gillnet 2011-2015 Ports

Vessel Trip Report (VTR) Data

The Portal’s vessel trip report (VTR) maps present a view the most important areas for commercial fishing by gear type. While the VMS maps show where fishing activity took place for catches like groundfish, the VTR maps instead show areas where there were a high presence of vessels that fish by bottom trawl, dredge, gillnet, longline, and pots and traps. There are four maps for each gear type covering five-year time windows from 1995-2015.

Most federally permitted commercial fishing vessels are required to submit VTRs for each fishing trip containing information such as the date, number of crew on board, species and quantities caught, and where they fished.

The VTR maps are also referred to as “Communities at Sea” because they can show which ports relied on any given area of the ocean. Users can click any point on the map for a pop-up revealing which communities fished in that area.

Upon turning on a VTR map – for example Gillnet 2011-2015 (seen above) -- a companion layer will automatically activate listing where vessels of that gear type came from during that period. Upon clicking a port like Barnegat, New Jersey, you can learn that it accounted for 6,807 vessel trips, which represented 9.8% of the regional total, and 13,507 total fisherdays, or 6.8% of the regional total.


Party/Charter 2011-2015

Party/Charter 2011-2015 Ports

Party & Charter Boat Fishing


VTR data was also used to create four maps showing party and charter boat fishing in the 1996-2000, 2001-2005, 2006-10, and 2011-2015 timeframes. They can be accessed by clicking on the “Recreational Fishing” dropdown in the Fishing theme. Like the commercial fishing VTR maps, users can click on any point of the map for a pop-up disclosing which ports fished in the area.

A companion layer showing the home ports for federally permitted vessels will automatically activate when you select one of the recreational fishing maps. Users can click on a port to learn how many total trips, trips as percentage of the regional total, total fisherdays, and fisherdays as percentage of regional total were recorded for that location.

The map only represents party and charter boats that are permitted to fish in federal waters (beyond 3 miles from shore). Many more recreational fishing vessels operate out of ports along the Mid-Atlantic coast but remain closer to shore and therefore aren’t required to possess federal permits or submit VTRs.


Carl N. Shuster Jr. Horseshoe Crab Reserve

Management Areas

The Portal houses dozens of maps delineating fisheries management areas and closures. Many of these were added in 2021 based on feedback received from fisheries managers and industry members as part of a collaborative project conducted by MARCO, the Northeast Regional Ocean Council (NROC) and Responsible Offshore Development Alliance (RODA) through NOAA Regional Ocean Data Sharing Initiative.

The Management Areas organizational scheme in the Portal’s Fishing theme mirrors that used by the NOAA Fisheries New England/Mid-Atlantic GIS page. Data is grouped in a series of dropdowns based on fishery management plans such as Northeast Multispecies (Groundfish) and Atlantic Sea Scallop.

The “Expired Management Areas” dropdown contains layers for management or closure areas that are no longer being applied within current fisheries management regulations. Industry members in particular felt that these layers were important to display to give context to other maps and data on the Portal that depict fishing activity. Patterns of fishing vessel activity in any given year are the product of multiple factors including the currently managed or closed areas. By overlaying fishing vessel activity data organized by year(s) with the management or closure areas in place for those year(s), users can better understand drivers of fishing activity and explanations for year-to-year changes.

The “Management Areas: Other” dropdown contains the Carl N. Shuster Jr. Horseshoe Crab Reserve (shown above), which was added at the request of fishing industry members. Enacted in 2001 and named in honor of an American horseshoe crab scientist and conservationist, the zone extends roughly from Atlantic City, New Jersey, to Ocean City, Maryland, and is off-limits to fishing for horseshoe crabs, which can be used as bait for American eel, whelk, catfish and others.


Fishing Vessel Transit Counts (2021)

Fishing Vessels Tracked by AIS

Finally, the Portal contains annual and monthly maps based on Automatic Identification System (AIS) data that reveal fishing vessel traffic patterns. Since 2002, large vessels operating in U.S. waters have been required to carry AIS transponders, which send automated signals to nearby ships, onshore infrastructure and satellites indicating their identity, purpose, course and speed. Originally envisioned as a post-9/11 security measure, AIS data is now used by the public and private sectors for a far wider range of uses, including maritime safety, ocean planning and environmental protection.

The Portal’s Maritime theme contains AIS maps for fishing vessels for each year dating back to 2015. The maps present a composite of traffic for all fishing vessels, rather than breaking out ships by fishery or gear type, as the VMS and VTR do. By manually toggling through or automatically animating the monthly AIS fishing maps, it is possible to see how the volume and locations of activity changed throughout the seasons.


Party/Charter 2011-2015

Party/Charter 2011-2015 Ports

Artificial Reefs

Wrecks and Obstructions

Additional Data of Importance to Fishing


The Portal contains a trove of data that, while not directly depicting fishing activity or management zones, is of direct relevance to the industry. These include:

  • Thousands of maps showing the distributions of commercially important fish species in the Mid-Atlantic
  • The locations of artificial reefs and wrecks (seen in above overlay with party/charter boat fishing) that serve as fish havens
  • Oceanographic data for average sea bottom and surface temperatures, seasonal front formations, and other factors that influence fish movements
  • Seafloor habitat data, including information about the region’s canyons and the sediment types and terrains along the continental shelf
  • The locations of hazards for bottom-tending fishing gear, such as undersea cables and unexploded ordnances

Members of the Portal’s development team periodically conduct trainings with industry representatives, who have offered valuable insights on ways to make the site easier to use and data additions that can assist with their work.

Future Priorities

MARCO continues to improve its fishing maps to meet the needs of all Portal users. Each year, an Ocean Mapping and Data Team (OMDT) made up of consultants and state, federal, and tribal entities drafts a work plan that guides the map data and tool enhancement priorities for the coming year and beyond.

Many of the data additions and updates called for in the latest work plan arose from discussions with RODA and fishing industry members through the previously discussed NOAA-supported project. The recommendations include:

● The addition of more current VMS maps.

● Exploring options to reorganize the Fishing theme so the maps are grouped by fishery rather than data type (e.g. management areas, VTR, VMS).

● Incorporate portions of NOAA’s VTR-based recreational and commercial fishing footprint data

● Consult with NOAA, fishery management councils and others to ensure management areas layers are up to date and replace/retire maps as needed.

● Draft Communities at Sea maps showing shrimp fishing reported via VTRs in the Mid-Atlantic and Northeast.

Additional Information & Resources

We offer the suggestions below for those seeking more information and data relevant to fishing in the Mid-Atlantic may consult the online sources. For additional online sources, visit the Portal’s Resources & Data Links section.

  • The NOAA Northeast Fisheries Science Center offers information related to fisheries monitoring and research from the Gulf of Maine to Cape Hatteras.
  • The Mid-Atlantic Fishery Management Council is one of eight regional fishery management councils established by the Magnuson-Stevens Fishery Conservation and Management Act to manage fisheries within U.S. federal waters.
  • The Northeast Ocean Data Portal is the MARCO Portal’s northern counterpart, providing free and publicly accessible map data and information focused primarily on the New England coast.
  • MarineCadastre.gov provides authoritative and regularly updated map data on fishing and many other ocean uses at a federal level.

The Mid-Atlantic Regional Association Coastal Ocean Observing System (MARACOOS) OceansMap offers real-time information on ocean conditions from Cape Cod to Cape Hatteras.