In connection with the current investment project of building an liquefied natural gas (LNG) terminal in Świnoujście, an analysis of design solutions and operational features of the potential variant of an LNG carrier supplying gas from the Persian Gulf areas has been conducted. As a result of studying the waterway restrictions on the assumed route, the article presents the concept of the optimum LNG carrier size – its overall dimensions – along with an analysis of design parameters. A hull shape model was used to examine the hull resistance and propulsion system. Besides, the size of the ship engine room was estimated and the power demand of the main propulsion system was determined. The cost patterns of LNG carrier construction and operation was included as well as the estimated mean value of its construction unit cost