Two Russian Navy's corvettes enter Danish Territorial Waters.

According to information published by H I Sutton on June 18, 2022, two Russian Navy's corvettes (Buyan-M class and Tarantul class) violated the Danish territorial waters north of the Baltic Sea island of Bornholm.
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Russian Buyan M class corvette Velikiy Ustyug (Picture source: Судострой)

The Buyan class, Russian designations Project 21630 Buyan and Project 21631 Buyan-M, are a series of corvettes (small artillery and missile ships in Russian classification) developed by the Zelenodolsk Design Bureau for the Russian Navy.

The Project 21631 ships are said to be an up-to-date variant of Project 21630 Buyan small artillery ship, armed with the nuclear-capable Kalibr cruise missiles (SS-N-27 Sizzler) with a claimed range of at least 1,500 km and electronic countermeasure equipment.

The corvettes can reach a top speed of 26 knots (48 km/h) with a maximum cruising range of 2,300 nmi (4,300 km) at 12 knots. She has a length of 75 m, a beam of 11 m, and a displacement of 949 tons. The corvette has a crew of 52 sailors and an endurance of 10 days.

They are powered by CODAD (Combined diesel and diesel) propulsion system that includes four Zvezda M520 developing 14,584 shp (10,880 kW) and Kolomna Diesel, Pumpjet.

Bornholm is a Danish island in the Baltic Sea, to the east of the rest of Denmark, south of Sweden, northeast of Germany, and north of Poland. Occupying an area of 588.36 square kilometers (227.17 sq mi),[1] the island had a total population of 39,535 on 1 April 2022.