The RBU-1000 Smerch-3 's a 300 mm caliber Russian anti-submarine and anti-torpedo rocket launcher. It entered service around 1962-1963. It's similar in operation to the Hedgehog system used during the Second World War. The RBU-1000's remotely aimed by the Burya fire control system (which's also used by the RBU-6000 system). It's crewed by three men, two in the magazine room, one in the control center. The launcher consists of six barrels which are automatically loaded one at a time from a below… (More on Rbu-1000)