At what visibility should an autopilot coupled ILS approach be made if operational?

An autopilot coupled ILS (Instrument Landing System) approach is a highly precise landing technique that relies on specific visibility requirements to ensure safe operations, particularly for the successful execution of the approach. When operational, a visibility of 5000 RVR (Runway Visual Range) or 1 mile is typically required for conducting these types of approaches. This standard is in place to provide sufficient visual reference for the pilots to safely land the aircraft while relying on the autopilot systems.

Maintaining this visibility threshold is crucial because it provides adequate conditions for pilots to assess their environment and confirms that they can take over manual control if necessary, ensuring safety throughout the approach and landing phases.

Choosing this visibility requirement aligns with industry standards and regulatory guidelines, which are designed to enhance safety during operations involving automation, such as autopilot coupled ILS approaches.