1. A method for tracking an object that is embedded within images of a scene, comprising: (a) in a sensor unit that includes movable sensor, generating, storing and transmitting over a communication link a succession of images of a scene; (b) in a remote control unit, receiving the succession of images; (c) receiving a user command for selecting an object of interest in a given image of said received succession of images or derivative thereof, determining object data associated with said object and transmitting through said link to said sensor unit at least said object data; (d) in the sensor unit, identifying the given image of the stored succession of images and the object of interest using said object data, and tracking the object in at least one other image of said stored succession of images, said other image being later than said given image; (e) in the case that said object cannot be located in the latest image of said stored succession of images, using information of at least two images in which said object was located to predict estimated real-time location of the object and generating direction command to the movable sensor for generating realtime image of the scene and locking on said object.