Australia CASA Instrument Proficiency Study Guide & Practice Test

A steady green light signal indicates that the aircraft is authorized to land. This signal is commonly used in aviation to communicate critical instructions to pilots during the landing phase. In air traffic control operations, a steady green light serves as a clear and unambiguous indication that the aircraft is cleared for approach and can safely land on the designated runway.

The use of a steady green light for landing reinforces the idea that the aircraft can proceed with confidence, knowing that the runway is available for landing. This is vital for maintaining safe operations, ensuring that pilots can effectively manage their descent and approach without ambiguity in communication.

In contrast, other signals such as a steady red light would indicate the need to stop or remain clear, and a flashing light might convey different messages depending on the context. Therefore, understanding the significance of these visual signals is crucial for flight safety and effective communication in aviation.