MANEUVER OF RETURNING THE VESSEL TO THE SET TRACK AFTER PASSING THE TARGET

Abstract

This paper proposes a method of decomposing a set of initial bearings into subsets, each of which corresponds to a type of vessel passing strategy based on their initial parameters and the nature of the close-quarters situation. The method aims to perform a vessel evasive action and return it to the programmed (given) course. The paper investigates the problem of collision avoidance between vessels during their passing using methods of the theory of optimal discrete processes. The paper determines the most hazardous initial vessel bearing in a situation of approaching a target (another vessel, hereafter referred to as the target vessel or TV) by decomposing the set of initial bearings into subsets based on vessel movement and distance between them in the case of a close-quarters situation. The paper examines in detail the process of vessel evasive action in a close-quarters situation with a target vessel using computer simulation models in various initial conditions to choose the most optimal safe vessel passing strategy. The paper discusses the peculiarity of choosing possible safe vessel passing strategies. The paper examines different types of vessel return courses to the programmed course, depending on the situation of close-quarters situation with a target vessel, using computer simulation models. The paper determines possible risks and hazards that arise when returning the vessel to the given course during the safe vessel passing process with a target vessel. The paper presents examples of typical vessel passing situations with a target vessel at short distances using computer simulation models, including the circling maneuver of a vessel during passing with another vessel and overtaking maneuver of one vessel by another. Keywords: safety of navigation, prevention of collision of vessels, passing of vessels by evasion, the maneuver of returning the vessel to the programmed track.