The RBU-6000 Smerch-2 (Реактивно-Бомбовая Установка, Reaktivno-Bombovaja Ustanovka; rocket-bomb installation & Смерч; waterspout) is a 213 mm caliber Soviet anti-submarine rocket launcher.
The system entered service in 1960–1961 and is fitted to a wide range of Russian surface vessels.
Reloading is automatic, with individual rounds being fed into the launcher by the 60UP loading system from a below-deck magazine.
Serial production of the upgraded 90R1 rocket, featuring a non-contact proximity fuze, was launched in 2017.
ERASR has twin motor propulsion system which can fire the rocket in short range and long range mode to achieve a distance of 500 m to 8900 m. The rocket was successfully test fired from INS Chennai on 3 April 2023.