What would the coded report state for prevailing visibility of 12 statute miles?

In aviation weather reports, visibility is often coded using a specific format. When the visibility is reported as 12 statute miles, the correct coded representation is 12SM. This format is straightforward: the number represents the distance in statute miles, and "SM" stands for statute miles, clearly indicating the measurement used.

In contrast, the other choices present different scenarios. For instance, there are fewer statute miles indicated in the alternative options and in some cases, additional remarks are included, which changes the primary visibility report structure. The key takeaway is that visibility must be accurately reported in the standardized format for effective communication in aviation, and for 12 statute miles, the correct coded report is succinctly and correctly represented as 12SM.