In the context of aviation and aerospace, "Automatic De-Ice and Inhibitor" refers to a system or a type of fluid used to prevent the formation of ice on an aircraft's surfaces, particularly on the wings, control surfaces, and other critical areas.

De-icing fluids, also known as anti-icing fluids or inhibitors, are specialized chemicals applied to airplane surfaces to prevent ice from forming or to remove existing ice. These fluids lower the freezing point of water, making it more difficult for ice to form.

The term "Automatic" in this context suggests that the system is designed to apply the de-icing fluid automatically, without the need for manual intervention. This can be achieved through various means, such as:

1. Automated de-icing systems: Some aircraft are equipped with automated systems that spray de-icing fluid onto the wings and control surfaces when icing conditions are detected.
2. Inhibitor-based systems: These systems use a type of de-icing fluid that is applied to the aircraft's surfaces before flight. The fluid prevents ice from forming and can be automatically reapplied as needed.

The purpose of an Automatic De-Ice and Inhibitor system is to:

1. Prevent ice accumulation: Ice can significantly affect an aircraft's aerodynamics, leading to reduced lift, increased drag, and potentially even loss of control.
2. Ensure safe flight operations: By preventing ice formation, these systems help maintain the aircraft's performance and handling characteristics, ensuring safe flight operations.
3. Reduce maintenance: Automated de-icing systems can minimize the need for manual de-icing procedures, which can be time-consuming and labor-intensive.

Overall, Automatic De-Ice and Inhibitor systems play a critical role in maintaining the safety and efficiency of flight operations, particularly in cold and icy conditions.