ABSTRACT
Ship operability study is a computational procedure to estimate the percentage of time during which the ship may achieve its purpose. The case operability study of a passenger ship intended for operation in the Adriatic Sea, between ports Split and Ancona is presented. For the seakeeping analysis, semi-analytical expressions are employed. Wave data along the shipping route are obtained from the hindcast wave database, calibrated by satellite and wave buoy measurements. For each sea state that ship could encounter along the intended route in the past 23 years, seakeeping responses are calculated and compared with seakeeping limiting criteria relevant for passenger ships, as the frequency of occurrence of slams, green water, and propeller emergence, pitch, vertical acceleration at forward perpendicular, roll angle, and motion sickness criterion. It was found that vertical acceleration at the bow is the criterion that is firstly exceeded and the significance of the wave directionality effect is confirmed and quantified.
