Monitoring networks consist of energy unnatural nodes that are expected to function over an extended period of time making energy competent monitoring a chief feature for unattended networks. In such situation nodes are designed to transmit information only when an appropriate event is detected i.e. event-triggered transmission. As a result given the location of an event-triggered node the location of a real event reported by the node can be approximated within the node's sensing range. The places of the combat vehicle at different time intervals can be exposed to an opponent observing nodes transmissions.