To determine the freezing level and areas of probable icing aloft, the pilot should refer to which of the following?

To determine the freezing level and areas of probable icing aloft, referring to an AIRMET (航空仪器气象报告) or SIGMET (航空特别气象报告) is the most appropriate choice. AIRMETs provide information about weather conditions that may be hazardous to aircraft operations, including moderate icing, turbulence, and widespread areas of IFR conditions. Specifically, AIRMETs can specify freezing levels, which is essential for pilots to understand where icing conditions might occur.

SIGMETs, while generally issued for severe weather events, also provide critical information about significant meteorological conditions that could affect flight safety, including severe icing. Therefore, both AIRMETs and SIGMETs are crucial sources of updated information regarding ice conditions and freezing levels during flight planning and execution.

In contrast, while an Area Forecast can offer general information about weather in a wide area, it does not provide the specific details about icing levels that AIRMETs or SIGMETs do. Weather Detection Charts are graphical tools that illustrate weather conditions but may not explicitly indicate freezing levels or icing areas. Similarly, a METAR report is a routine aviation weather report that provides current weather conditions at airports but lacks predictive information about icing aloft. Thus, AIRMET