1. A method for navigating an airborne device relative to a target, comprising: detecting, at an signal detector associated with the airborne device, at least one signal generated by a signal emitter associated with the target; correlating, by a processor associated with the airborne device, the detected signal with a previously-detected signal; determining, by the processor based on the comparison, a change in location of at least one of the airborne device or the target; and adjusting a position of the airborne device based, at least in part, on the determined change in location.