Abstract: Apparatus (10) for identifying the position of a body (21) in a scene (20) comprises a first station (11) incorporating a raster-scan imaging device (15) having a field of view (19) with azimuthal and elevational rotational freedom and variable magnification the settings of which are respectively sensed by sensors (24,25,26). A signal processor (16) collects the video signal from device (15) and the sensor signals and adds the latter to part of the raster scan which, in playback, does not obscure the video picture generated by the video signal. The processor (16) is connected by lead (28) to a second station (12) which incorporates a raster-scan playback device (32) associated with an operator-actuated electronic cursor generator (33).