Global Fishing Watch, Transshipment Report Refined: Research and Analysis


By: Rusdianto Samawa, Direktur Eksekutif Global Base Review (GBR


Global Fishing Watch offers an interactive online platform that displays fishing activity and other vessel data and tools to help you monitor global fishing patterns. Whether you’re looking for general facts about our organization or specialized information about how to use our platform, we can help you.

Our commitment to open data and transparency is paying off. Input from Global Fishing Watch users and the public, is helping us refine and improve our analyses. Today, we’re publishing an update to our groundbreaking transshipment report. Download the report and data now.

Last February we published The Global View of Transshipment: Preliminary Findings, an original report that maps and analyzes transshipment behavior around the globe.

In addition to our own analysis of the data, we made our transshipment vessel list and our data on likely and potential rendezvous publicly available. These lists were based on our detailed analysis of the behaviors of fishing vessels and transshipment vessels carrying Automatic Identification Systems (AIS). We released these data so that the wider community could use them, and also so that we could get feedback to improve our datasets.

We’re excited to say that a broad community has engaged with the data and provided valuable feedback. Given this feedback, and our continued work, we felt it would be valuable to produce a revised report that incorporates these changes.

Notable updates include the following: Our original report referred to “potential transshipments” and “likely transshipments.” We have substituted these labels with “potential rendezvous” and “likely rendezvous” to address some who felt that using “transshipment” was too definitive. Our new language better allows for the possibility that rendezvous may represent something other than transshipment, as vessels may meet at sea for a number of reasons.

More than 300 vessels were flagged by our readers as being potentially unable to transship at sea. We reviewed each of these vessels, one by one, and while we found 111 were capable of transshipment at sea, 216 vessels from our original list are likely only capable of transshipping in port. These 216 vessels have been removed from our database. In our original report, these vessels accounted for 0.3% and 7.1% of likely and potential transshipments respectively. Although this new analysis shows they were unlikely to have engaged in transshipment, the overall patterns of transshipment behavior on a global scale remain unchanged from our original report.

Additions: We have added 97 new transshipment vessels to our database and extended our analysis of both potential and likely rendezvous through June 23 of 2017 (original analysis ran through December 31st of 2016), identifying an additional 699 likely rendezvous.

You can download our updated lists of transshipment vessels and potential and likely rendezvous as well as the updated report.

These updates have improved the data, but the overall picture is more or less unchanged–at first glance, it is difficult to see a difference between the old map and the new one.


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