When are AIRMETs particularly useful for pilots?

AIRMETs, or Airmen's Meteorological Information, are critical tools for pilots operating under instrument flight rules (IFR) as they provide vital information about weather conditions that may affect flight safety. They are specifically designed to alert pilots to potentially hazardous weather phenomena, such as low-level turbulence, icing conditions, and visibility restrictions due to fog or clouds.

Option C highlights their importance in maintaining instrument flight safety, which is essential for pilots navigating in limited visibility or adverse weather conditions. AIRMETs are issued for specific weather conditions that can impact instrument approaches and overall flight safety, making them invaluable to pilots who rely on instruments for navigation and control.

The other options, while touching on various aspects of flying, do not accurately represent the primary function of AIRMETs. They are not limited to severe storms, nor are they exclusive to visual flight rules, as pilots may encounter weather impacts outside of solely visual conditions. Additionally, AIRMETs do not pertain directly to achieving landings, but rather to ensuring safe flight operations in general.