An active proximity system (120, 150) mountable on an unmanned autonomous vehicle (UxV) (110, 140) and configured to operate in a restricted area populated with one or more emitters, the one or more emitters including at least one other UxV, the APS (120, 150, 400) is characterized in that it comprises: two or more proximity sensors and a processing circuitry operably coupled to the two or more proximity sensors; the two or more proximity sensors are configured to sense two or more proximity signals arriving from multiple directions, including vertical directions or horizontal directions relative to the UxV, each of the two or more proximity signals is transmitted by and is indicative of presence of a respective emitter in proximity to the UxV (110, 140) within the area thereby providing a virtual cage around the UxV; the processing circuitry is configured, responsive to a sensed proximity signal transmitted by a respective emitter, to continuously monitor the signal and generate instructions to: cause the UxV to move closer and then away from the emitter in a continuous back and forth motion along a boundary between the UxV and the emitter as defined by the sensed proximity signal, wherein: upon determining that at least one measurable parameter of the sensed proximity signal complies with a first condition, the processing circuitry is configured to generate maneuvering instructions dedicated for causing the UxV (110, 140) to move and increase a distance between the UxV (110, 140) and the respective emitter; and then upon determining that at least one measurable parameter of the sensed proximity signal complies with a second condition, the processing circuitry is configured to generate maneuvering instructions dedicated for causing the UxV (110, 140) to move and decrease the distance between the UxV (110, 140) and the respective emitter; and thereby maintain the UxV (110, 140) within a certain range from the respective emitter defined by the sensed proximity signal and the first and second conditions and increase the number of UxVs that can operate concurrently in the restricted area. two or more proximity sensors and a processing circuitry operably coupled to the two or more proximity sensors; the two or more proximity sensors are configured to sense two or more proximity signals arriving from multiple directions, including vertical directions or horizontal directions relative to the UxV, each of the two or more proximity signals is transmitted by and is indicative of presence of a respective emitter in proximity to the UxV (110, 140) within the area thereby providing a virtual cage around the UxV; the processing circuitry is configured, responsive to a sensed proximity signal transmitted by a respective emitter, to continuously monitor the signal and generate instructions to: cause the UxV to move closer and then away from the emitter in a continuous back and forth motion along a boundary between the UxV and the emitter as defined by the sensed proximity signal, wherein: upon determining that at least one measurable parameter of the sensed proximity signal complies with a first condition, the processing circuitry is configured to generate maneuvering instructions dedicated for causing the UxV (110, 140) to move and increase a distance between the UxV (110, 140) and the respective emitter; and then upon determining that at least one measurable parameter of the sensed proximity signal complies with a second condition, the processing circuitry is configured to generate maneuvering instructions dedicated for causing the UxV (110, 140) to move and decrease the distance between the UxV (110, 140) and the respective emitter; and thereby maintain the UxV (110, 140) within a certain range from the respective emitter defined by the sensed proximity signal and the first and second conditions and increase the number of UxVs that can operate concurrently in the restricted area. upon determining that at least one measurable parameter of the sensed proximity signal complies with a first condition, the processing circuitry is configured to generate maneuvering instructions dedicated for causing the UxV (110, 140) to move and increase a distance between the UxV (110, 140) and the respective emitter; and then upon determining that at least one measurable parameter of the sensed proximity signal complies with a second condition, the processing circuitry is configured to generate maneuvering instructions dedicated for causing the UxV (110, 140) to move and decrease the distance between the UxV (110, 140) and the respective emitter; and thereby maintain the UxV (110, 140) within a certain range from the respective emitter defined by the sensed proximity signal and the first and second conditions and increase the number of UxVs that can operate concurrently in the restricted area.