The maritime Automatic Identification System (AIS) is a radio communications system by which vessels continuously broadcast their identity and position over public airwaves using unencrypted VHS radio signals. When it was developed almost 20 years ago, its primary purpose was to increase safety at sea: ships needed a better way to “see” each other and […]
AIS for Safety and Tracking: A Brief History Read More »
Last Monday, we held a webinar in which 48 registered Global Fishing Watch users had an opportunity to hear from, and ask questions of, two of the authors of our recent report “The Global Footprint of Transshipment.”
Our Recent Webinar Success Bodes Well for More to Come Read More »
Over the past couple of months, SkyTruth analyst Bjorn Bergman has been watching some interesting activity by the Chinese fishing fleet in the Pacific. A large Chinese flagged squid-fishing fleet had been fishing at the boundary of Peru’s exclusive economic zone (EEZ) throughout the summer and fall of 2016. Then, near the middle of December,
Mystery Moves: What’s Up in the Pacific? Read More »
In 2016, 33 countries agreed to establish a global network of scientifically supported Marine Protected Areas (MPAs) that will increase the amount of ocean area protected from the current 2 percent to 10 percent by the year 2020. MPAs either restrict human activity such as fishing, or they prohibit it all together. But the question
A New View of Marine Protected Areas Read More »
Automatic Identification System (AIS) messages are transmitted over radio waves. The system was designed, in part, so that vessels could “see” the positions of nearby ships on a monitor and avoid collisions. These radio signals are received by satellites and used for many monitoring purposes. Each boat can broadcast a distinct message as often as every two
What Does an AIS Message Look Like Anyway? Read More »
Unusual fleet behavior off West Africa spurs our analyst to investigate Just because something appears suspicious, doesn’t mean laws are being broken. Jumping too quickly to conclusions could embroil a legally operating fishing fleet in unwarranted investigations or accusations. Equally damaging would be to rush in on a crime without solid evidence and lose the
Witness to a Crime? Read More »
Last week, a visitor to our site asked if Global Fishing Watch can be used to track whaling ships. The short answer is yes, sometimes. At the moment, our machine learning algorithms are being designed to classify three major types of fishing activity—trawling, longlining and purse seining—but some whaling vessels report themselves as “fishing vessels,”
Where are the Whalers? Read More »
It’s been three weeks since we launched Global Fishing Watch, and the new technology platform has created a buzz around the globe from Europe to Southeast Asia, China, Brazil, Costa Rica, Australia and even landlocked parts of the world such as Pakistan and Iran. Users of the map hail from all over as well, and while there’s
Breaking Ground Means Breaking News Read More »
None of what we’re doing at Global Fishing Watch would be possible without the advancements in computing power that have occurred in recent years. The volume of data we work with would have been overwhelming in the past. In one random sample, we observed more than 127,000 vessels over a 24-hour period broadcasting the Automatic
Teaching Machines to Tell Us About Fishing Read More »
Check out this Tweet by Rustu Yucel who used the Global Fishing Watch map to watch the close of the fishing season in Cypress this summer!
Tweeting End of Season Read More »
Ports provide an important source of information to help us combat Illegal fishing and understand the science and economics of global fisheries. “They serve as the interface between land and sea for fishing vessels,” says Wessley Merten, our data and fisheries analyst at Oceana. “Wherever there’s a port, there’s an interaction. Whether it be offloading
What Ports Can Tell Us Read More »
Occasionally, the AIS messages transmitted from a ship provide a location that makes no sense, say, in the middle of the Antarctic or over a mountain range. In such cases, either the AIS transponder has malfunctioned, the data got scrambled in transmission, or the system has been tampered with in a deliberate attempt to disguise
When Vessels Report False Locations Read More »
The satellite-based Automatic Identification System (AIS) is great for locating vessels, but it’s not fully reliable for identifying them. AIS broadcasts coded messages that include information about a vessel’s identity such as its name, ship
Clarifying Identity: Matching Broadcasts to Vessel Registries Read More »
At Global Fishing Watch, we hear it all the time: “Tracking commercial fishing vessels from satellites is such a great idea, and it seems so easy!” In fact, we’ve received a few questions from our readers asking us why this isn’t just a simple hack of publicly available data.
AIS and the Challenges of Tracking Vessels at Sea Read More »
To help researchers better understand how much fish is being taken from the ocean, we’re developing ways to use our data for estimating the total potential catch of the global fishing fleet. It’s a big and a complex question to answer, partly because the source of our information, AIS, is limited. It doesn’t tell us
How Much Fish Can A Fisherman Fish? (and how we’re trying to find out) Read More »
