What type of conditions does a Non-Convective SIGMET indicate?

A Non-Convective SIGMET is issued to inform pilots about weather phenomena that may impact flight safety, excluding convective activity, such as thunderstorms. The correct answer encompasses both dust storms and sand storms, as well as severe turbulence and icing.

Dust and sand storms can significantly reduce visibility and may pose dangers during takeoff and landing. They are often associated with strong winds that create blowing dust or sand, making it important for pilots to be aware of these conditions.

Severe turbulence and icing also fall under the umbrella of Non-Convective SIGMETs. Severe turbulence can affect the stability and control of an aircraft, and icing can create hazards by accumulating on the wings and control surfaces, leading to decreased performance.

By including all these weather phenomena, the Non-Convective SIGMET provides a comprehensive warning that addresses multiple hazards that pilots could encounter.