EVALUATION METHOD FOR OPERATION EFFICIENCY OF CARGO HANDLING AND ADVANCED SAFETY SHIP MOORING SYSTEM

Harbour tranquillity is generally evaluated only as wave height at the location of a moored ship. Safety is maintained if the wave height is less than 50 cm, and is not maintained if it is greater than 50 cm. A wave height of less than 50 cm may occur during cargo handling. In order to estimate the moored ship motions, the wave period and wave direction as well as the wave height must be given. However, moored ship motions are influenced by the characteristics of the mooring system, therefore it is more useful for the harbour tranquillity index to use the moored ship motions directly, instead of the wave height in a harbour. This paper proposes an evaluation for operational efficiency of cargo handling by using the moored ship motions directly. An advanced mooring load monitoring system for a moored ship is described and its uses explained.