What does 'SAY MDA 1,310' mean in aviation communication?

The phrase 'SAY MDA 1,310' in aviation communication refers to "Minimum Descent Altitude" at a specific altitude of 1,310 feet. MDA is a standard term used during the approach phase of flight, particularly when flying under instrument flight rules (IFR). It indicates the lowest altitude to which a pilot may descend on an approach without having visual reference to the runway or the surrounding terrain, ensuring safety during the landing process.

Understanding MDA is critical for pilots, as it establishes a safe altitude during the final approach when visibility is reduced. It helps in managing risks associated with potential obstacles and terrain below that altitude, especially when the pilot does not have the required visual cues for landing. It's important for pilots to be aware of this altitude as it guides them in making sound decisions about whether to continue the approach or execute a go-around.

The other options refer to different altitudes that are either not correctly applicable to MDA or pertain to concepts not used in this context. Therefore, the correct interpretation of 'SAY MDA 1,310' as "Minimum Descent Altitude one three one zero" is essential for safe flight operations.