What type of ice is described as granular and should be managed carefully?

The correct answer is rime ice. This type of ice forms when supercooled water droplets freeze upon contact with a surface, resulting in a granular texture that can create a rough, frosty appearance. Rime ice typically develops on the leading edges of wings and control surfaces in conditions of light precipitation and moderate icing. Due to its granular nature, rime ice can significantly disrupt airflow over the wings and impact an aircraft's performance, making it essential for pilots and maintenance crews to manage it carefully.

Understanding the properties of rime ice is crucial for flight safety, as it can affect lift and control effectiveness. Proper de-icing and anti-icing measures must be employed to minimize the risks associated with rime ice accumulation. If not managed properly, it can lead to compromised aircraft performance, particularly during critical phases of flight such as takeoff and landing.