The System Dynamics Computer Simulation Modeling Methodology is one of the most suitable and effective ways of dynamics modeling of complex non-linear, natural, technical and organization systems. Studying the dynamics behavior of Marine Electric Power Systems, as one of the more complex dynamic non-linear technical systems, requires the application of only the most effective modeling methods. The aim of this paper is to show the efficiency of the System Dynamics Computer Simulation Modeling of the dynamics behavior of Marine Diesel-Drive Generating Set, as one of the most complex and non-linear marine technical systems. The Marine Diesel-Drive Generating Set will be presented as a qualitative and quantitative system dynamics computers model with a special automation aspect provided by two UNIEG-PID-regulators (Electronics Universal PID Regulators). One of them will be used for diesel-motor speed (frequency) regulation and the other will be used for the synchronous electrical generator voltage regulation. This Computer Simulation Model of the Marine Diesel-Drive Synchronous Generating Set is very suitable education simulator software, especially for marine students and marine system engineers because it provides them with the means to conduct numerous simulations for various productive scenarios.