THE HIGH-SPEED DISPLACEMENT SHIP SYSTEMATIC SERIES HULL FORMS-- SEAKEEPING CHARACTERISTICS

In the operation and design of high-speed ships, a greater emphasis is placed on good seakeeping performance because it is found that large motions and high accelerations can significantly degrade the operational capabilities. The need for better hull forms and the increased interest in seakeeping performance call for more and better data to be available at the design stage to obtain a right balance between seakeeping and other, often conflicting, requirements. In this paper, the genesis of a systematic series of model experiments is given, illustrated with results. Attention is focused on the general thoughts underlying the series, the selection of the characteristic section shape, the selection of the basic hull shape, the choice of the parameters to be varied in the series, and the parameters to be fixed from the outset. The choice of the parent hull form and the seakeeping aspects associated with this choice are discussed, and the amalgamation of the data in the form of design charts is shown.