Abstract
In order to have an intelligent supporting system for collision avoidance manoeuvre using a fuzzy model we need to research it in the form of simultaneously incorporating navigational environment, ship's manoeuverability and nawigator. In this paper the authors determine forms of membership function, of fuzzy-probability sets: “risk assesment on collision in observation time”, “safe assesment on collision in manoeuvring” and “way economy in collision avoidance manoeuvre”. The forms of the membership function are determined for three types of ships (small, medium, large) and for two visibilities (poor, good) in different regions of water (open sea, restricted). Therefore, the authors discuss distributions of the probability density of the membership function and the correlation among them.
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