STUDY ON THE CRITICAL RANGE BY COURSE CHANGING MANOEUVER

It is very important and necessary to know the critical range at which collision is unavoidable by course changing manoeuvre. To obtain this it has been necessary to develop a mathematical model of collision avoidance and occurrence. The authors have used a new analytical technique,using an area of collision target's position. Different versions of the critical range by course changing are obtained under assumptions such as a) one ship evades while the other stand on b) one ship evades while being pursued by the other. The study shows that the critical range by course changing depends strongly on the two ship's speed difference and on the permissible manoeuvre.