The aim of the final paper is to show the accuracy of maritime electronic charts and their possibility of development through the adaptation of the system to the requirements of el. navigation based on user needs. With its mandatory commissioning, ECDIS has become the primary navigation device on board. The paper contains five parts. The first part of the paper is an introduction in which the topic of the paper, goals and structure of the paper are briefly presented. The second part explains the electronic navigation charts. Their division into vector and raster maps and their advantage or disadvantages are explained. The third part explains in detail the characteristics of the ECDIS system. Today's modern electronic technologies applied in the maritime sector have already significantly improved the possibilities for conducting safe navigation The fourth part concerns the accuracy of nautical charts. This part of the paper will explain what is the accuracy and timeliness of maritime electronic charts. At the end of the paper is a conclusion in which the findings gained during the preparation of the paper are presented