Graphic reflection of regions of impermissible values of parameters and their application

It is indicated in work, that the decline of accident rate of vessels at sailing in the straitened waters is one of major problems of increase of safety of navigation. It is shown that the straitened districts of sailing with especially intensive motion presently by the stations of traffic control of vessels which along with the control of process of navigation are intended for the management by motion of the dangerously drawn together vessels. Therefore, development of methods of management by the dangerously drawn together vessels is actual and perspective scientific direction. The analysis of the last achievements and publications is produced, the decision of the examined problem is begun in which. At the analysis the basic questions of warning of collision of vessels are lighted up, the choice of situation of rapprochement of ship with a target from the great number of standard situations is thus considered, whereupon determination of strategy of divergence is produced, and also conception of flexible strategies of divergence is explored. Principles of locally-independent and external are considered management by vessels in the situation of dangerous rapprochement. It is shown that in a number of works the regions of impermissible values of parameters of motion of pair of vessels are offered, the scopes of which divide pair combinations of parameters of motion of vessels, as points of plane, the axes of which there are the chosen parameters, on possible and impermissible parts. Four parameters of motion of pair of vessels are considered in work, two from which are permanent, and remaining two parameters are examined, as variable quantities, and equalization which characterizes dependence between in-out parameters is offered. The indicated dependence represents a curve on the plane of in-out parameters and is the border of region of their impermissible values. For points belonging to this region, rapprochement of vessels is dangerous, and in the case when the chosen point are on the border of region, or out of her, that rapprochement of vessels is safe. Therefore for estimation of danger of situations of rapprochement of vessels the graphic reflection of region of impermissible values of in-out parameters in the system of coordinates of these parameters with possibility of indication of point with the initial values of parameters is offered, according to the regulations of which it is possible to judge about its belonging of region. A situation is considered, in which ships at dangerous rapprochement can not change the course, and warning their collision is possible only by the change of speeds. In this case speeds of vessels get out as in-out parameters, and the courses of vessels are unchanging. Equalizations of scopes of region for this case are resulted. It is shown that the scopes of regions of dangerous values of speeds are straight lines.