What does the acronym "PIREP" stand for?

The acronym "PIREP" stands for Pilot Report. This term is commonly used in aviation to describe a report submitted by pilots concerning the actual conditions they encounter during flight. PIREPs provide crucial real-time information about weather conditions, turbulence, cloud formations, icing, and other phenomena that can impact flight safety and operational efficiency.

These reports are valuable for both air traffic control and other pilots, as they contribute to a better understanding of the atmospheric conditions in specific areas. This information is particularly important for flight planning and in-flight decision-making, as it helps crews adjust their routes or altitudes based on actual reports from those currently in the air.

The other options do not align with the established terminology used in the aviation industry, as "Pilot Response," "Pilot Reference," and "Pilot Regulations" are not accepted definitions for PIREP and do not pertain to the critical communication between pilots and aviation authorities regarding in-flight conditions.