РЛС л.р. 4.1, МАНЕВРЕННЫЙ ПЛАНШЕТ, Решения задачи, расхождение с одним судном, поворот вправо

Procedure for solving the divergence problem on a maneuvering plotter. 1) Make entries in the radar data processing table for the heading (IKn) and speed (Vn) of own ship. 2) From the center of the plotter, draw the own ship's movement vector for 6 minutes, Vn. 3) From the center of the plotter, draw a circle with a radius of Dzad. 4) Observing the situation on the radar screen, select the echo signal of the dangerous vessel based on the change in relative polar coordinates. 5) Take the bearing and range readings of the dangerous vessel's echo signal from the radar screen, note the vessel's time, and make entries in the radar information table for the zero point at time 0' (bearing and range for vessel A). 6) Using this data, plot the initial situation on the maneuvering tablet, designating the zero point as 0' and a capital letter A. 7) Using a parallel ruler, direct (insert) the vector of own vessel's movement over 6 minutes, Vн, to the zero point and designate its origin as F (Fixed). Designate the vector as Vн. 8) Draw circles in the area of ​​the zero point, with radius Vн, from the center F, which will speed up the graphical solution of the problem. 9) At 6 minutes, take the bearing and range readings of the echo signal of the same vessel A and record them in the radar information processing table. 10) Using the obtained data, plot the 6-minute point on the maneuvering plotter, designating it as 6'. 11) Connect the zero and 6-minute points with a straight line to determine the target's relative movement vector over 6 minutes. The vector arrow points toward the 6-minute point. Designate this vector as Vo. 12) Extend vector Vo to the center of the plotter. This will yield the LODA trajectory along which vessel A's echo signal will move, assuming the courses and speeds of both own and oncoming vessels remain constant. 13) Drop a perpendicular from the center of the plotter onto the LODA and record the value of Dcr. 14) Determine the time of closest approach of the vessels, tcr, using the graphic vector Vo from the 6' point to the base of the perpendicular to the Dcr line. 15) Record the obtained values ​​of Dcr and tcr in the radar data processing table on the maneuvering plotter. 16) Connect point F with the 6-minute point by a straight line. This yields the 6-minute target vector Vc, directed toward the 6-minute point, and designates it Vc. 17) Using a parallel ruler and a measuring device, determine the true course and speed of target vessel A and record the data in the radar data processing table on the maneuvering tablet. 18) Plot the lead point (a 12-minute point is recommended, taking into account the data acquisition time) and draw dashed lines from it tangent to the circle Dzad. This yields the LOADs along which the vessel's echo signals should move during the maneuver. 19) From the 6-minute point, draw lines parallel to the LOADs in the opposite direction to determine the dangerous course sector (DCS), beyond which the end of vector Vn must be moved to solve the avoidance problem. If F is within the DCS, reducing speed is impossible. 20) Select an effective avoidance maneuver at a safe distance. Moreover, the change in course and/or speed must be large enough to be noticed by an oncoming vessel. 21) Based on the above, when choosing a turn to starboard, connect point F with the intersection point of the arc drawn by radius Vн and the corresponding side of angle СОК. This will yield our vessel's 6-minute vector Vн' after the course change maneuver. Connecting this point with the 6' point yields a new vector of the target's relative movement after the maneuver, designating it Vo'. 22) Transfer the resulting vector Vн' to the center of the chart using a parallel ruler, marking it with a dash-dotted line. Record IKn and Vн in the radar data processing table for the 12th minute. 23) Determine the point of return to the vessel's initial motion parameters by drawing a line parallel to LOD and tangent to the circle Dzad. The point of intersection of this line with OLOD is the point of return to the initial motion parameters. 24) Determine the time of return to the initial motion parameters by measuring the distance between the 12-minute point and the return point using the relative velocity vector Vo'. Determine the divergence time and record it in the radar data processing table.