The Purga class, Russian designation Project 22120 Purga (blizzard), is a series of ice-strengthened patrol ships designed by Petrobalt Design Bureau and being built by Almaz for the Russian Coast Guard.

Project 22120 is a new generation border patrol vessel with an icebreaking capability, allowing it independent navigation in areas with ice thickness up to 0.6 m during winter-spring and up to 0.8 m during summer-autumn season.

The class is intended for operations in waters near Sakhalin, Russia's largest island.

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