Analysis of Ship Handlers' Maneuvers with respect to Ship's Speed under Strong Cross Current hi the Breakwater Approach

摘要

In order to ascertain the effect of ship's speeds under the condition of strong cross current in the breakwater approach of Busan port, this paper is to deal with the analyses of vessel proximity measures, vessel controllability measures, and ship handlers' subjective evaluation measures of simulated maneuvers, which were carried out by 76 ship handlers who conned Panamax bulk carrier of 60,000 DWT, The set and drift of current are southwesterly and 2 knots. The speeds of the model ship are 5, 7.5 & 10 knots respectively. The followings are concluded. First, in the breakwater approach of Busan port, ship handlers psychologically tend not to give the drift angle of more than 10° because ship's head points out of the entrance. Second, ship handlers' subjective evaluation measures, proximity measures and controllability measures are relatively larger under the speed of 5 knots than under that of 10 knots, due to direct pressure of strong current. Third, a single index of controllability measures was suggested, by removing their units.