CHRACTERISTICS OF MEASURED BERTHING VELOCITY AND THE APPLICATION FOR FENDER DESIGN OF BERTHING SHIP

Ship's berthing speed were measured at several major container berths in Japan and in South Asia. Analysis was made on the characteristics of berthing speed with tug boat assistance, thruster use, wind speed, wave height and so on. It is found that the berthing speed is mostly dominated by the berthing manner. Berthing speed obeys log-normal distribution while other three factors obey normal distribution. And coefficient of variance of those three factors are considerably small than that of berthing speed, therefore one can determine partial safety factor only for the berthing speed against the target safety index while the partial safety factor of the other three factors to be 1. 0. Under controlled berthing operation average of berthing speed may be 8 to 9cm/s and coefficient of variance may be 0. 5.