Which of the following statements is true regarding anti-icing operations?

The statement that types of anti-icing fluids vary based on ambient conditions is accurate because different anti-icing fluids are designed to perform optimally under specific temperature ranges and weather conditions. For instance, some fluids may be effective at lower temperatures, while others are formulated to prevent ice formation at higher ambient temperatures. Understanding these variations allows flight crews to select the appropriate type of fluid based on current weather conditions and ensure effective anti-icing operations.

In contrast, the other statements do not hold true. For example, anti-icing is not limited to takeoff; it is important throughout the entire flight operation, especially in conditions prone to icing. Furthermore, anti-icing procedures may still be necessary even on warm days if there are conditions that could lead to ice formation, such as high humidity or the presence of moisture in the air. Lastly, while de-icing fluids can provide anti-icing benefits, anti-icing is not restricted solely to them; specially formulated anti-icing fluids can also be utilized effectively. Understanding these nuances is crucial for safe flight operations in various weather conditions.