Which statement is true regarding the publicized VDP when using the Rockford altimeter setting?

The statement that VDP (Visual Descent Point) is not authorized when using the Rockford altimeter setting is accurate primarily due to the airspace and procedural standards governing specific approaches. The VDP is defined as a point on the final approach course of a ILS or visual approach from which a normal descent from the MDA (Minimum Descent Altitude) to the runway can be initiated, provided that the required visual references are in sight.

In certain airspace configurations or under specific operating conditions, such as when using an altimeter setting that does not provide accurate elevation reference (like the Rockford setting in this scenario), the use of a VDP may not be allowed. This ensures safety by preventing pilots from descending below the MDA without proper visual references or altimeter settings that might misrepresent altitude.

Understanding this aspect is crucial for pilots, as operating under the presumption that the VDP is authorized could lead to unsafe descents or approach profiles. Therefore, the correct approach involves adherence to operational mandates, which dictate the use of the VDP in conjunction with appropriate altimeter settings, emphasizing operational safety at all times.