Which of the following would not be entered as a visibility value on MF1M-10?

In aviation weather reporting, visibility is an essential element as it significantly affects flight operations and safety. Reported visibility values typically fall into certain measurable categories. The MF1M-10, a format used by weather observers, restricts the reported visibility values to specific increments that can be easily communicated and understood.

Values in increments of 1/16 miles, such as 1/16, 3/16, and 5/16, are standard and acceptable for reporting visibility. These values correspond to physical visibility distances that can be directly measured and reported under the MF1M-10 guidelines.

In contrast, 7/16 is not a standard increment used in visibility reporting as per the MF1M-10 standards. Visibility is generally rounded to the nearest 1/8 miles when reported, and 7/16 does not conform to that convention, making it an invalid entry for visibility in this context. This is why it would not be entered as a visibility value in the MF1M-10 report.