What is the primary purpose of a PIREP?

The primary purpose of a PIREP, or Pilot Report, is to communicate important meteorological information from the perspective of pilots who are currently in flight. This information includes details such as turbulence, cloud cover, visibility, wind conditions, and other atmospheric phenomena encountered during the flight. PIREPs are critical for other pilots and air traffic controllers, as they provide real-time insight into the weather conditions in specific areas, which can aid in decision-making regarding flight safety, routing, and planning.

The focus of a PIREP is firmly rooted in reporting weather conditions, which enhances safety for all air traffic by allowing for timely sharing of relevant environmental information. This is distinct from the other choices, which either relate to operational efficiency (such as flight delays), passenger welfare, or technical maintenance issues, none of which are the primary focus of a PIREP.