Speed–wave height operational envelope for high-speed planing craft in seaways: theoretical vs. empirical methods

Himabindu Allaka, Morel Groper

Research output: Contribution to journalArticlepeer-review


High-speed planing craft operating in real seaways encounter high impact loads. The extreme motions and accelerations resulting from such impacts adversely affect the structure of the craft and its payload as well as pose a risk to the crew on-board. Limiting craft speed according to the sea state using a speed-wave height operational envelope might ensure structural integrity and greatly improve safe navigation. Accurate estimation of motion and acceleration of planing craft in a seaway is a key requirement in developing reliable and usable allowable speed vs. wave height operational curves. In this paper, the Motion Assessment of Planing Craft in a Seaway (MAPCS) tool, a nonlinear time-domain approach vs. several existing approaches based on experimental, empirical and classification societies’ formulas for vertical accelerations and speed vs. wave height limit curves are compared. It is found that the MAPCS approach provides more realistic estimations compared to the commonly employed methods.

Original languageEnglish
JournalShip Technology Research
StateAccepted/In press - 2021

Bibliographical note

Funding Information:
Research at the University of Haifa was conducted at the Hatter Department of Marine Technologies in the Subsea Engineering Lab. This work was supported by the Israeli Ministry of Defense, Directorate of Defense Research and Development (DDR&D) [grant number 444101164]. This study was also supported by the Leona M. and Harry B. Helmsley Charitable Trust, the Maurice Hatter Foundation, and the Paul Amir Foundation. The authors are grateful to Israel Shipyards Ltd. for providing an opportunity to conduct experiments on a Shaldag MK II and MK V craft. The authors also thank the Coastal and Marine Engineering Research Institute, Israel, for providing real sea wave elevation data.

Publisher Copyright:
© University of Duisburg-Essen 2021.


  • Planing craft
  • hydrodynamics
  • motion assessment
  • operational envelope
  • theoretical vs. empirical models
  • vertical accelerations

ASJC Scopus subject areas

  • Ocean Engineering


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