On Sunday, May 18, Russia detained the Greek oil tanker Green Admire, which had left the Estonian port of Sillamäe. The vessel was following an agreed route through Russian territorial waters.

This is reported by the ERR publication, Censor.NET informs .
The detention of the Liberian-flagged tanker Green Admire took place in Russian territorial waters, where the vessel was traveling along a previously agreed route.
The vessel left an Estonian port and was heading to its destination, Rotterdam, carrying shale oil. The tanker is owned by the Greek company Aegean Shipping.
It is noted that ships usually pass through Russian territorial waters, as this route is considered safer for large vessels than passing through shallow waters in Estonian waters.
This sea route was previously agreed upon between Estonia, Russia, and Finland.
The Estonian Transport Department said that to avoid similar incidents, ships heading to the port of Sillamäe will be rerouted only through Estonian territorial waters. The department also added that such cases have not been recorded before. Джерело: https://censor.net/ua/n3552928
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I’m glad it was a Greek vessel. Greece hasn’t been very helpful with the shadow fleet problem.