. In this paper we discuss the theoretical principles the method of design characteristics optimization of high-speed passenger catamarans. The goal of the paper is to determine the role and place of the proposed method in the development of sea passenger traffic and island tourism in the Socialist Republic of Vietnam and to illustrate its capabilities in relation to the interests of different participants of process. As a rule, the existing ships are purchased on the secondary market, and new ones are often designed and built at foreign shipyards. This is a reason to develop the design methods that take into account the regional characteristics of Vietnam. The novelty of this research is based on the fact that the proposed method takes into account the regional features, combines mathematical and optimization models of various design levels and allows to take into account the interests of participants of a program for development of maritime transport infrastructure and tourism in Vietnam. The theoretical principles of ship theory, ship design, mathematical programming and statistics were used for the method development.
 In this paper we present the results of design characteristics optimization of high-speed passenger catamarans and comparative analysis of these results with the main dimensions of modern high-speed passenger catamarans. The proposed method can be used in the design and assessment of the economic efficiency of high-speed passenger catamarans. The results can be used in Vietnam government program oriented to development of sea transport infrastructure and tourism.