Abstract: A method of guidance for an aircraft includes obtaining relative position data indicative of a direction from a location of the aircraft to a location of a moving target point. The method also includes determining, based on the relative position data, a location of a virtual leader based on projecting the location of the aircraft onto a virtual leader path, where the virtual leader path corresponds to a straight approach path to the location of the moving target point along a desired approach direction. The method further includes determining, based on the location of the virtual leader, a guidance input to cause the aircraft to follow the virtual leader.

Abstract: Methods and apparatus to guide an unmanned aerial vehicle for recovery thereof are disclosed. A disclosed example apparatus includes a sensor at or proximate a tether line, the sensor to measure at least one parameter of an aircraft while the aircraft is in flight and provide sensor output corresponding to a position of the aircraft, and a transceiver to transmit data corresponding to the position to the aircraft for guiding the aircraft to engage the tether line for recovery of the aircraft or a payload carried by the aircraft.

Abstract: A method of guidance for an aircraft includes obtaining relative position data indicative of a direction from a location of the aircraft to a location of a moving target point. The method also includes determining, based on the relative position data, a location of a virtual leader based on projecting the location of the aircraft onto a virtual leader path, where the virtual leader path corresponds to a straight approach path to the location of the moving target point along a desired approach direction. The method further includes determining, based on the location of the virtual leader, a guidance input to cause the aircraft to follow the virtual leader.

Abstract: Aircraft guidance with transmitting beacons is disclosed. An example apparatus includes a transceiver of an aircraft to receive signals from deployed beacons, a signal analyzer to analyze the signals to determine distances of the respective beacons relative to the aircraft, and a position calculator to calculate a positional zone of the aircraft based on the distances.

Abstract: Aircraft guidance with transmitting beacons is disclosed. An example apparatus includes a transceiver of an aircraft to receive signals from deployed beacons, a signal analyzer to analyze the signals to determine distances of the respective beacons relative to the aircraft, and a position calculator to calculate a positional zone of the aircraft based on the distances.

Abstract: Methods and apparatus to guide an unmanned aerial vehicle for recovery thereof are disclosed. A disclosed example apparatus includes a sensor at or proximate a tether line, the sensor to measure at least one parameter of an aircraft while the aircraft is in flight and provide sensor output corresponding to a position of the aircraft, and a transceiver to transmit data corresponding to the position to the aircraft for guiding the aircraft to engage the tether line for recovery of the aircraft or a payload carried by the aircraft.