What is AIRMET primarily concerned with?

AIRMET, which stands for "Airmen's Meteorological Information," is primarily concerned with less severe weather events that may affect flight operations. It provides information about weather phenomena that, while not severe enough to warrant a SIGMET (which is for more dangerous weather conditions), can still pose risks to pilots flying under visual flight rules (VFR) or those in smaller aircraft.

AIRMETs cover conditions such as moderate turbulence, light icing, and widespread areas of restricted visibility due to fog, smoke, or other factors. The focus on these less severe weather events is crucial for safety and flight planning, as pilots need to be aware of potentially hazardous conditions that may not be extreme but can still impact their flight experience significantly.

In contrast, the other options do not accurately reflect the purpose of an AIRMET. Flight navigation, emergency landing procedures, and air traffic penalties relate to different aspects of aviation safety and regulation rather than specific weather conditions that an AIRMET addresses.