Entries by Bjorn Bergman

Systematic GPS Manipulation Occuring at Chinese Oil Terminals and Government Installations

Analysis reveals precise location and timing of GPS interference but purpose remains unclear.

Last month, an article in MIT Technology Review described strange GPS anomalies in Shanghai. I began investigating, and have now found evidence of a novel form of GPS manipulation occurring at at least 20 sites on the Chinese coast during the past year.

Unusual Behavior by Tankers Near Brazil Oil Spill

The source of the massive oil spill affecting Brazil remains unclear, but unusual tanker activity raises questions.

For months now, oil has been washing up on the beaches of northeast Brazil. Government officials, scientists and non-governmental organizations around the world — including SkyTruth — have been trying to identify the source of the pollution; so far, unsuccessfully. SkyTruth analyst Bjorn Bergman recently decided to take a look at AIS ship-tracking data in the region and found some unusual behavior from oil tankers passing through the area.

New Milestones for Fisheries Transparency in Indonesia and Peru

Until recently public tracking of fishing activity has been almost entirely dependent on AIS (Automatic Identification System) data, an open system for vessel tracking and collision avoidance. It’s exciting to see this changing with the success of Global Fishing Watch’s Transparency Program. This program began when Indonesia’s fisheries minister Susi Pudjiastuti took the unprecedented step […]

Tracking the Chinese Squid Fleet in the South Pacific – Part 1: Voyage to the Galapagos

When monitoring vessel activity on the vast scale of the world’s oceans at SkyTruth we know we’re almost always dealing with incomplete information. For example, only some vessels transmit their locations at sea via the Automatic Identification System (AIS), while others may only come up in a particular government’s private Vessel Monitoring System (VMS) or […]