What is indicated by the term "Descent Altitude/Height" in IFR operations?

The term "Descent Altitude/Height" in IFR (Instrument Flight Rules) operations is correctly represented by the acronym DA/H. This term refers specifically to the altitude or height at which a pilot initiates the descent to a runway during an approach to landing, particularly in precision and non-precision approaches. It is critical for determining the safe altitude at which the aircraft can begin its descent while ensuring that terrain and obstacles are adequately cleared.

Understanding the significance of DA/H is essential for real-time decision-making during approach and landing phases of flight. It supports pilots in maintaining a safe operational envelope as they navigate through varied airspace and terrain. Other terms such as MAA (Maximum Authorized Altitude), MEA (Minimum Enroute Altitude), and MCA (Minimum Crossing Altitude) serve different purposes in IFR operations. They relate to other aspects of navigation, altitude-related clearances, and enroute performance, but do not describe the specific point of descent during an approach. Therefore, DA/H is the most accurate and relevant choice in the context of descent operations.