Fuzzy approach to dimensioning the navigational safety in maritime transport

The safety of ships involved in the process of transport is one of the most important criteria in the maritime transport. Important factors making up the safety include the technical efficiency of the ship, the qualifications of the people in charge of the ship and the conditions under which the transport process takes a place. The paper focuses on the problems significant and characteristic to the ship traffic safety under uncertainty conditions. The ship safety at supervised traffic requires continuous identification of the navigational situation. Very often safety assessment of the traffic situation is made by examining the relative positions of vessel’s domains. A limitation is that under uncertainty conditions and more than two vessels we have to take into consideration dynamic domains according to the situations of conflicts, which is rather difficult to analyse. One way to assess the traffic safety approximation is analysis of the potentially conflicting situation. Safety in maritime transport can be analysed at the micro level (safety of the ship, the safety of navigation in specific situation mobility) and in terms of macro models (evaluation over time).In the article some problems of fuzzy description of traffic safety in maritime transport are presented. Basic definitions and a stochastic approach to concept of traffic safety in transport are given. The fuzzy approach to stochastic method of dimensioning traffic safety, useful in dynamic traffic control, is proposed.