"sankt-peterburg" has a fully integrated diesel-electric propulsion system with main diesel generators supplying power for both main propulsion as well as ship's service loads while underway. her main power plant consists of two 9-cylinder wärtsilä 9l32 and two 12-cylinder wärtsilä 12v32 medium-speed diesel engines. in addition, there are two wärtsilä 4l20 auxiliary diesel generators for use when the vessel is at port.