Following is the claim for this invention:-

1. In this invention we have a centralised control system which helps to maintain striking distance with their targets for respective drones. There is an air space shared by a fleet of drones and each drone is assigned a target to hit based on parameters like type of drone, target type, proximity, priority, etc. by the centralised control system. The centralised control system will have access to the list of targets intruding the air space shared by the fleet of drones and will use any behaviour flocking algorithm to understand the respective flight paths of the targets, the manoeuvring motions of the targets, the objects under attack by the targets, etc. Based on the above gathered information, periodically the centralised control system informs each of the respective drones about the next estimated geographical coordinate of their target in next few seconds if applicable, current geographical coordinate of their target, flight path taken by their target in last few time units, image and information about next target to hit, etc. The drone might also use its own target object detection and tracking technique to be within striking distance of the target. If the above drone loses track of the target, then it will either wait for the periodic update of the target information from the centralised control system or it will request the centralised control system for the up-to- date target information. The above novel technique of providing a centralised control system helping to maintain striking distance with the target for a drone is the claim for this invention.