What details are recorded on PIREPS?

The correct answer highlights the essential information typically included in a Pilot Report (PIREP), which is crucial for updating aviation weather information. PIREPS often focus on real-time data that pilots observe during their flights.

Recording time provides context for when the report was made, which is critical for tracking weather changes and flight conditions. Altitude is important as weather phenomena can vary significantly at different altitudes, influencing flight safety and navigation. Temperature is a key factor that can affect aircraft performance and may also indicate weather changes, such as the presence of ice. Lastly, the aircraft's position is vital for providing a clear geographical context for the observations, enabling other pilots and air traffic control to understand the conditions reported.

The other options include details that may be relevant in different contexts but do not encompass the primary focus of PIREPS, which is immediate weather information as observed by pilots during flight. For instance, flight numbers, departure and arrival times, and wind speeds are generally used in filed flight plans rather than reported in PIREPS. Similarly, while pilot names and aircraft types are important for identification, they do not directly pertain to the weather phenomena that PIREPS aim to convey.