Abstract
Analysis of Ship's Safety Improvement in Confined Waters with use of the Decision Support System Based on Expert ManoeuvresThe paper presents analysis of possible ship's safety improvement in confined waters with the use of an expert system for navigator's decision support, constructed on the grounds of the knowledge base of gathered manoeuvres for a given type of ship, loading and hydrometeorological condition. The system generates results of encountered decision problems in the form of information about proposed adjustments of main engine, helm and tugs controls and future trajectory presented by means of panoramic graphic interface equivalent to vector large scale ENC and text interface of commands.
Highlights
Simulation studies give perfect opportunity to record the expert knowledge of pilots commanding vessels in the relevant area
Creation of a decision support system based on such knowledge can lead to safer manoeuvring and ship’s safety improvement in confined waters
The main advantage and strength of the presented decision support system lies in its simplicity and its flexibility
Summary
Simulation studies give perfect opportunity to record the expert knowledge of pilots commanding vessels in the relevant area. In order to acquire expert decisions most relevant for current ship’s situation the expert passage most close in the aspect of registered state vector parameters has to be found. On the basis of the presented target function the decision tree for the expert system has been created and algorithm implemented in DelphiTM environment [4] The results of this system work are expert decisions regarding ship’s controls adjustments corresponding most closely to the current vector state. These decisions are presented in the form of matrix (or table) with commands in standard marine vocabulary for 3 consecutive manoeuvres taken previously by expert pilot. 2000 1900 ship path limits without decision support system at 95% confidence ship path limits gained with decision support system at 95% confidence ship path limits gained by experts at 95% confidence
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