A criminal case has now been filed in regard to a major servicing of the Kurily , one of seven Vishnya class Project 864 intelligence ships. These ships were originally built in the 1980s at the Stocznia Północna shipyards in Gdansk, Poland. The ship is used for radio interception of communication channels, telemetry and electronic surveillance, and the monitoring of sea lane traffic.
These ships are still powered by Polish-made Zgoda-Sulzer 12АВ25/30 diesel engines, which require periodic servicing. The Northern, Baltic, and Pacific fleets each have two ships of this type, with the seventh assigned to the Black Sea fleet.
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