Which statement about descent on an ILS approach is true?

When conducting an ILS (Instrument Landing System) approach, maintaining proper altitude discipline is crucial for safety and procedural compliance. The statement that emphasizes not descending below the minimum until established on final aligns with standard operating procedures in aviation.

During an ILS approach, pilots must adhere to prescribed altitudes until reaching the final approach segment and must be established on the glideslope and lateral path. The "minimums" refer to the minimum decision altitude (MDA) or minimum descent altitude (MDA) that serves as a critical safety threshold. If the aircraft reaches this altitude before being visual with the runway or having the required references to continue the approach, the pilot is expected to execute the missed approach procedure rather than descend further.

This approach ensures that pilots avoid attempting to land without adequate visual or instrument confirmation that they can safely do so, which aligns with safety regulations and best practices in aviation. Compliance with these standards helps prevent controlled flight into terrain (CFIT) accidents and ensures safe operations within controlled airspace.