Using the visibility conversion table, what SM corresponds to an RVR of 1600?

Using the visibility conversion table, what SM corresponds to an RVR of 1600?

• A. 1/2 SM
• B. 1 SM
• C. 1/4 SM
• D. 2 SM

Answer: (C)

The key idea is how the visibility conversion table maps runway visual range (RVR) values in feet to statute miles (SM). The table rounds or bins RVR into common quarter-mile steps. An RVR of 1600 feet is about 0.303 miles, which is closest to 0.25 miles (1/4 SM) when rounded to the nearest quarter-mile. Therefore, in this table, 1600 ft maps to 1/4 SM. The other options would correspond to much larger visibility values (0.5, 1, or 2 miles) and don’t match the closest quarter-mile bin for 0.303 miles.

The key idea is how the visibility conversion table maps runway visual range (RVR) values in feet to statute miles (SM). The table rounds or bins RVR into common quarter-mile steps. An RVR of 1600 feet is about 0.303 miles, which is closest to 0.25 miles (1/4 SM) when rounded to the nearest quarter-mile. Therefore, in this table, 1600 ft maps to 1/4 SM. The other options would correspond to much larger visibility values (0.5, 1, or 2 miles) and don’t match the closest quarter-mile bin for 0.303 miles.