Russia’s far east ports go dark in AIS interference outbreak

14 August 2025 Lloyd's List 

RUSSIA’s far east is the latest area to experience severe disruption to Automatic Identification System data, with 98 vessels, mainly tankers, having been affected since August 6, according to Lloyd’s List Intelligence data.

There have previously been signs of third-party interference off Nakhodka Bay, where Kozmino oil terminal is located, as early as September 2024, but this was limited to vessels approaching the port.

On August 6 there was a sudden increase in the number of incidents of disruptions to AIS data across the entire bay and the area just outside of it.

The interference is so severe that false location data is being received for ships throughout the entire period they are loading cargo, making it impossible to track their activity during this time with AIS alone.

Ships that are caught up in the interference are the victims of third-party efforts to disrupt and manipulate Global Navigation Satellite System receivers, which AIS systems rely on to derive position information.

GNSS interference is a common feature of conflict zones.

In the case of Russia, incidents of signal interference around its maritime trading lanes first emerged in November 2023.

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