輻輳海域における避航操船基準の有効性

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Author made a proposal on maneuvering standard to avoid collision among ships based on a fuzzy model of collision avoidance maneuver. As well known there are often different decision makings on the same ship-encounter among navigators and between them on board and VTS operator ashore although they have common traffic rules. First author analyzed and evaluated the assessing process of navigator on collision avoidance maneuver under various encounters among ships using ship handling simulator. Based on the results author constructed a fuzzy reasoning model for subjective risk assessment on collision, SJ. Supposing a safety level, SJ^*, which is an admissible risk level of SJ by a navigator or VTS operator, author proposed to have a common value of SJ^* as an aiming safety level among people concerned in navigation in congested and VTS area. Author studied how the average and variance of subjective assessment value on the risk of collision (SJ) exert influence on the safety of navigation at congested waters and maneuvering load on navigator by making traffic simulation in which the fuzzy reasoning model was installed. Finally the simulation results indicated that each ships in congested waters should be operated based on the common maneuvering standard in order to increase the safety of navigation and share the same maneuvering load among ships concerned. VTS operators should also timely make advice and give information of traffic to vessels based on the same standard.
1991-09-25

著者

原潔
神戸商船大学(前)

輻輳海域における避航操船基準の有効性

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