Abstract
In this article author describes three methods based on fuzzy set theory to determinate safe ship trajectories in the collision situation in fuzzy environment: branch and bound method, dynamic programming method and method based on genetic algorithms. Optimal safe ship trajectory in collision situation is presented as multistage decision-making in a fuzzy environment. The Collision Avoidance Regulations, the maneuverability parameters of the ship and the navigator’s subjective assessment in making a decision are taken under consideration in the process model.
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