This final paper deals with the topic of distribution of electricity in the ship's power system. In the further part of the work, the development of the ship's electric power system is described and the difference between alternating current and direct current used on the ship is emphasized. It also talks about the subsystems used in the ship's power system, such as generators, transformers, accumulators and others. The main part of the work is devoted to the distribution of electrical energy on board. It explains in detail how this energy is distributed, what types of cable networks are used, as well as what are the functions of the switchboard and the development trend of marine power systems through a hybrid system is described. In the conclusion, the importance of efficient and safe distribution of electricity on the ship is emphasized once again, and it is emphasized that this is a key element of the ship's power system. Key