Coding the visibility as "1/3rd 3, 1/3rd 5, 1/3rd 4" would result in what?

When visibility is coded as "1/3rd 3, 1/3rd 5, 1/3rd 4," it communicates multiple visibility values observed in various directions. Each segment of the code specifies the visibility in a certain direction, with the fraction indicating that the visibility was observed in that direction for part of the time.

In this specific coding, the different visibility readings point to variances in conditions, with values like "3, 5, and 4" representing the distinct visibility distances measured. To interpret this correctly, one must note how visibility reports work in aviation meteorology.

The outcome of combining these observations suggests that the lowest visibility (in this case, 3 statute miles) is a significant indicator, and visibility is typically reported as a single value unless otherwise noted. Therefore, when this code is analyzed, it results in an average visibility determined by the most restrictive condition being applied, which is the 3 statute miles in the coded information.

Thus, reporting the average visibility of 4 statute miles (SM) aligns with sustaining a broad view when translating combined observation data. This value considers operational requirements where the lowest visibility often influences flight operations and safety requirements. Therefore, the correct interpretation of the visibility coding in