Category III Grid accuracy is approximately what distance?

• A. 8 to 15 meters
• B. 16 to 30 meters
• C. 31 to 60 meters
• D. 61 to 120 meters

Answer: (B)

Grid accuracy categories describe how close the reported grid coordinate is to the actual target location, expressed as the allowable error distance. For Category III, that error is about 16 to 30 meters, meaning the real target could lie within a 16–30 meter radius of the reported grid. This mid-range accuracy reflects typical conditions where coordinates come from standard maps or devices with moderate precision. In general, smaller numbers mean tighter accuracy (e.g., 8–15 meters would be more precise), while larger numbers indicate less precision (e.g., 31–60 meters or 61–120 meters). So the 16–30 meter range best fits Category III.