A supercharged marine diesel engine having at least one exhaust gas turbocharger and a separate power turbine is connected in parallel with the supercharger turbine. At least one auxiliary diesel engine drives a synchronous generator for supplying the shipboard grid with electrical energy. The power turbine is connected to a free shaft end of the auxiliary diesel/generator unit. By this arrangement, it is possible to reduce the load on the auxiliary diesel engine, which results in a substantial saving in fuel.
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