The development of electronic navigational charts and display systems has greatly improved modern navigation. Existing regulations require only a part of SOLAS vessels to posses official electronic navigational charts and display systems. Other vessels are only obliged to do so to a small extent or not at all. They mainly use official paper and unofficial electronic charts. It should be noted that unofficial charts are not regularly maintained. Therefore, they differ fundamentally in terms of response, i.e., the timing of integrating maintenance data into the corresponding information content. Therefore, in this doctoral thesis, a response model of an electronic navigational chart system under dynamic conditions is proposed. Two mental ideal models of real ECDIS and ECS systems used on SOLAS and non-SOLAS vessels have been developed. In the design of the model, all currently known external elements affecting the behavior of the electronic chart system under dynamic conditions were defined. The advantages and disadvantages of the performance and application standards of the ECDIS and ECS systems, the standards for the training of seafarers and the standards for the maintenance of the navigational charts on different vessels have been identified. Their desirable features are defined within the model. To address the deficiencies, changes to the standards and regulations for the use of ECDIS and ECS systems are proposed. The response of the navigational charts as an element of the proposed models was verified using the collected data. The data were collected using the new proposed methodology that measures the deviation time in the processes of maintaining electronic navigational charts, defined in this doctoral thesis. In this way, it is possible to determine the response time of navigational charts on a global scale, which is considered to contribute to the improvement of the quality control system of their producers. The results of the data processing obtained based on real-time measurements and the survey method confirmed the existence of discrepancies in the maintenance times of the different navigational charts. In order to improve seafarers situational awareness, the same maritime safety information must be displayed at the same time on every vessel, regardless of the type of chart and display system. The potential of the scientific and practical application of the model is presented along with the research results of the thesis. Analysis of the external elements affecting the response of the electronic navigation chart systems highlights the need to develop guidelines related to situational awareness for all stakeholders.