What would be the encoding for wind speed of 15 knots with directions varying between 180 and 220 degrees?

The correct encoding for a wind speed of 15 knots with directions varying between 180 and 220 degrees would typically reflect both the speed and the variable direction of the wind. In aviation meteorology, wind direction is expressed in degrees and wind speed in knots.

The reference to "B. It would not be encoded" suggests that the variability between 180 and 220 degrees is not represented in a conventional wind report. However, variable winds are usually expressed in a specific format when they vary over a defined range. For instance, in aviation weather reporting, a wind that is variable from a certain directional range is reported as "WV" followed by the range. The appropriate format for a varying wind like this would typically indicate both the wind speed and the directional variability.

The option claiming it would not be encoded implies that this specific format of reporting the variability is not applicable, which is not correct; the wind data should be encoded in accordance with the established meteorological reporting guidelines. Therefore, acknowledging how the wind speed and its variability are presented, the answer that encapsulates the proper format for this wind condition would be the one that includes directional variability in the appropriate report structure.