Last week the Russian corvette Makhachkala was launched by Almaz, St Petersburg. She will be joining sister ships Astrakhan and Kaspiysk in the Caspian Flotilla. Project 21630 Buyan class was designed by Zelenodolsk Design Bureau, Tatarstan, Russia for coastal defense and engagement with surface warships . The 550 t displacement corvette has an LOA of 203 ft and the propulsion system is a twin screw CODAD arrangement comprising two Zvezda M520 radial 56 cylinder diesel engines. Each of output power 3,970 kW (5,323 hp) at 2,000 rpm. [More]