How is the VDP calculated?

The Visual Descent Point (VDP) is an important concept in instrument flying, particularly during the approach phase to a runway. It represents a calculated point at which a pilot can begin their descent to the runway using visual references.

The correct way to calculate the VDP is to take the Minimum Descent Altitude (MDA) and subtract the Foot Effective height (FE), then divide the result by three. This approach gives pilots an altitude that allows for a safe descent to the runway while providing adequate time and space for the approach.

Using this formula ensures that the descent remains within safe parameters dictated by the aircraft's performance capabilities and the current weather conditions, especially since it is important for pilots to have a visual reference to assess the situation effectively during descent.

Choosing the correct calculation method ensures pilots have actionable and accurate information that can enhance both safety and compliance with published procedures.