What does P6SM signify in meteorological reports?

In meteorological reports, "P6SM" indicates that visibility is greater than 6 statute miles. The "P" prefix specifically signifies "greater than," while "6SM" refers to the measurement of visibility in statute miles. This notation is commonly used in aviation and meteorology to communicate visibility conditions clearly and concisely to pilots and weather observers.

The use of "P6SM" is important for flight safety, as it informs pilots of airspace conditions, helping them make informed decisions regarding takeoff, landing, and navigation. Understanding visibility is crucial in meteorology, particularly in aviation contexts, where poor visibility can significantly impact operations. Other choices misinterpret what the "P" indicates, leading to confusion regarding visibility conditions.