The purpose of the research is to develop methods for calculating the maneuvering characteristics of electric ships’ propulsion systems based on the theory of dynamic similarity. The feasibility of moving to generalized mathematical models is justified by the possibilities of broad generalization of the results obtained. Results. Based on the developed mathematical model, a method for calculating transient modes of electric vessels’ propulsion complexes was constructed. Criteria for dynamic similarity and generalized dimensionless parameters of the complex are found. A research methodology has been developed using the provisions of the dynamic similarity theory. The possibility of using the methodology is illustrated using the example of assessing the inertial characteristics of electric vessels. The possibility of using the developed methodology when searching for ways to improve maneuvering quality indicators is shown. Scientific novelty. The use of dynamic similarity criteria and generalized dimensionless parameters makes it possible to cover in research a large class of vessels. It becomes possible to minimize the impact of inaccuracy in assessing external factors on research results. Electric ships with equal values of similarity criteria and equal values of generalized parameters will have the same values of maneuvering quality indicators. Practical significance. The resulting recommendations for assessing maneuvering quality indicators cover entire series of electric ships. They are ready to use. Their application is illustrated by the example of finding ways to improve maneuvering efficiency. The recommendations contribute to the construction of electric ships with predictable maneuvering properties.