How would a moderate dust storm be encoded for transmission in an observation?

In aviation weather reporting, phenomena such as dust storms are encoded according to standardized abbreviations to facilitate clear and concise communication among pilots and meteorological services. The abbreviation for a moderate dust storm is "DS." This coding reflects the intensity and type of weather phenomenon being observed, allowing for quick recognition by those interpreting the data.

Using "DS" ensures that the observation is efficiently communicated and understood, which is crucial for flight safety and planning. The other options, such as "MS," "MD," and "DUST," may not align with the established conventions for encoding weather phenomena in aviation reports. Each abbreviation serves a specific purpose, and adherence to standardized codes is essential for maintaining clarity and consistency in weather reporting.