Research On The Post-evaluations Of The Ship Routeing Schemes Of Rearl River Eatuary Waters

The ship’s routeing system, which is very important to reduce or avoid marine accidents and ensure ships’safe navigation, represents the development direction of water navigation and is an important mean to implement effective management in busy waters. To ensure the effectiveness of ship’s routeing, it’s s necessary to conduct post-evaluations.In order to facilitate the post evaluation and revision of ship’s routeing in Pearl River estuary waters, this paper, through investigations, questionnaire surveys and other methods, made a statistical analysis of vessel traffic flows in DAHAO CHANNEL and DANGAN CHANNEL, analyzing the quantities, characteristics and trends of five traffic flows in DAHAO CHANNEL and six traffic flows in DANGAN CHANNEL. Based on the comprehensive analysis of the factors influencing ship’s routeing as well as taking the characteristics of navigation environment in the Pearl River Estuary into consideration, the comprehensive evaluation index system of the Pearl River estuary waters ship’s routeing was formed, which contained 19 indexes. The questionnaire was designed according to the index system and the results were counted, analyzed and processed. The analytic hierarchy process was used to determine the weight of each index in the whole system. The Likert 5 point scale method was employed to rate the impact of different levels in questionnaires and quantify the qualitative indexes. Combined with the weights of the indexes, the safety and effectiveness scores of the two ship’s routeing systems were obtained, respectively. Five scores corresponded to five different safety and efficacy ratings. And then the comprehensive scores of two ship’s routeing were calculated and the effectiveness of the routeing systems was got, which would provide some references for the maritime administrative departments.It can be seen from the results that the safety levels of DAHAO CHANNEL and DANGAN CHANNEL routing system are relatively safe and the effectiveness is good. However, to achieve the goal of ensuring safe navigation, the ship’s routeing system should be further revised and modified.