Russia fires at Ukrainian targets with a Improved Kilo-class submarine.

According to a tweet published by Ryan Chan on April 29, 2022, the Russian Ministry of Defense has released a video showing a diesel submarine, that could be an Improved Kilo-class submarine, launching Kalibr missiles at Ukrainian targets.
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Kalibr missile (Picture source: Russian Ministry of Defense)

Project 636.3 also called Varshavyanka class is an upgraded version of the Kilo-class submarines that entered into service with the Russian Navy in June 2014.

The new submarine features stealth technology as well as extended cruising range and the ability to strike surface, land, and underwater targets. They are crewed by 52 submariners, have an underwater speed of 20 knots, and a cruising range of 400 miles with the ability to patrol for 45 days.

These submarines have a length of 73.8 m, a draft of 6.2 m, a width of 9,9 m, a displacement of 3,100 tons (submerged), and a maximum immersion depth of 300 m.

The Project 636.3 submarines can launch Kalibr / Club land-attack cruise missiles, anti-ship missiles, and anti-submarine missiles. The submarine is also armed with 533-millimeter torpedo tubes and carried a total of 18 torpedoes.

About Kalibr missile

The 3M-54 Kalibr also referred to it as 3M54-1 Kalibr, 3M14 Biryuza, (SS-N-27 Sizzler and SS-N-30A), 91R1, and 91RT2 is a family of Russian cruise missiles developed by the Novator Design Bureau (OKB-8).

The Kalibr is a family of Russian-made surface to ship, submarine-launched and airborne anti-ship and coastal anti-ship (AShM), land-attack cruise missiles (LACM), and anti-submarine missiles developed by the Novator Design Bureau. According to Russian military sources, the missile has an estimated range of around 1,500 to 2,500 km.