Level 1: Indirect receipt of payload data
Level 2: Direct receipt of payload data and in communication with the UAV
Level 3: Direct receipt of payload data and control of payload (e.g. pan, tilt, zoom)
Level 4: Direct receipt of payload data, control of payload, and control of air vehicle (e.g. waypoints and airspeed)
Level 5: Direct receipt of payload data, control of payload, control of air vehicle, take-off and land