Date of Award


Document Type


Degree Name

Master of Science (MS)


Ocean Engineering and Marine Sciences

First Advisor

Prasanta Sahoo

Second Advisor

Ronnal Reichard

Third Advisor

Hamid Hefazi

Fourth Advisor

Stephen Wood


It is important to understand asymmetrical catamarans motions since it influences the loads which increases stress on structures while causing discomfort to passengers and crew members. Researchers so far have been mainly focused on motions characteristics of the conventional catamaran hull forms. There is scant literature or research work in the public domain on asymmetrical catamaran hull form, with regards to its seakeeping performance. This thesis undertakes a comparative analysis of the motion characteristics between newly developed alternative catamaran hull forms of different asymmetrical configurations. The asymmetrical catamarans developed from the original NPL round bilge catamaran hull forms have a hull length of 40 m and separation ratios (s/L) of 0.2 and 0.4 Salvesen et al. (1970) developed the theoretical background of strip theory which forms the basis for computing the heave and pitch responses of marine vessels. The hulls were tested in sea state 3 with a mean significant wave height of 1.25 m and at Froude numbers 0.2, 0.5 and 0.8. The aim of this study was to compute heave and pitch response along with added resistance in waves between the two new asymmetrical catamaran hulls against conventional catamaran hull forms. It is anticipated that this study would provide a tool to designers to improve the designs of catamaran hull forms based on the seakeeping performance. This study provides a pathway for a better understanding of asymmetrical catamaran hull forms.


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