The Pr. 206 (NATO reporting name: Shershen-class) was a Soviet motor torpedo gunboat developed in the late 1950s as a replacement for Project 183 "Bolshevik" motor torpedo boats. Project 206 was to be used near the friendly coast in good weather and under air cover. The Pr. 206 was 34.7 m in length, had a 6.7 m beam and a draught between 1.46 and 1.5 m. The propulsion was made of three M-503A diesel engines producing 4,000 hp each, with every engine having its own propeller shaft. The engines allowed the ship to reach a maximum speed of 83 km/h. Primary armament consisted of two AK-230 CIWS at stern and bow, aided by the MR-104 Rys track radar, the Shershen was also equipped with an MR-102 Baklan search radar allowing searching for surface and air targets. The torpedo armament was composed of four 533 mm torpedo launchers with two tubes on each side of the hull. Additionally, 12 BB-1 depth charges or 6 mines could be carried. 87 Shershens were made for the Soviet Navy, with 10 boats being made in Yugoslavia for the local navy. A total of 123 ships were manufactured, with over 30 being exported to foreign operators. One of the most prominent users of the Shershen was the East Germany Navy which operated 18 vessels until 1990, followed by 16 units operated by Vietnam and 14 by Yugoslavia.

Project 206 was introduced during Update 1.79 "Project X" when the Soviet fleet was implemented into the game. The Pr. 206 boats had great manoeuvrability paired with above-average speed as well as very good torpedo armament. The 53-36 torpedoes found on the Shershen have a very high speed of 93 km/h, paired with an 8 km range with no torpedo mod equipped and a 400 kg TNT eq. warhead making them one of the most versatile torpedoes after the Japanese Type 93 Long Lance. Primary armament is also very strong due to the high fire rate of the rotary AK-230 cannons. The offensive power of the Pr.206 matches no other motor torpedo boat except some of the heavier armed frigates such as Köln or SKR-1.