Kulakov M. Development of method to choice the maneuver of collision avoidance by the ships’ speed under external management

Creating procedure of region of dangerous courses for elementary vessels group taking into account changing of their speeds is resulted at dissertation research accordingly. An analytical method and graphic diagrams allow to define the situation indignation value depending on the current approaching each other situation for a case, when the ship’s speed less than the speed of target. In instance, when maneuvering by the change of course is impossible, creature procedure of region for dangerous speeds is offered, by which it is possible to choose the maneuver of collision avoidance through the changing of their speeds. Dissertation research basic part is devoted to such question as choice of optimum maneuver of vessels collision avoidance through the changing of their speeds taking into account their inertia-brake descriptions in different modes of speed slowdown. Based on the initial situation of dangerous vessels approaching each other, existence of great number of safe maneuvers of vessels collision avoidance through the changing of their speeds can be determined by using the region of dangerous speeds taking into account their inertia-brake descriptions in active and passive modes of speed slowdown. Offered determination procedure of optimum maneuver of vessels collision avoidance through the changing of their speeds based on analytical method allows to calculate the time moment for vessels slowdown commencement, at which distance of the shortest approaching is equal to minimum-possible distance of approaching. Procedure of computer graphic determination of optimum maneuver of vessels collision avoidance through the changing of their speeds is offered in dissertation research. To verify offered procedure accuracy, the examples of determination of optimum maneuver of vessels collision avoidance through the changing of their speeds with different modes of speed slowdown are offered. Accuracy verification of maneuver of vessels collision avoidance is provided by simulation. For this purpose, some of initial situations of dangerous approaching were taken to determine optimum maneuver of vessels collision avoidance for each one. Simulating of that maneuvers was provided same as their analysis, which shown good accuracy of all of them. That means following - calculated values of transition period for both vessels speed slowdown, time and distance for closest point of approaching are equal to the same values obtained for all considered maneuverers. Keywords: safety of navigation, vessels collision avoidance, external management, maneuver of collision avoidance through the speed-reducing, region of dangerous speeds.