In a terminal environment, when should you use the terms 'super' or 'heavy'?

The correct answer revolves around the use of the terms 'super' or 'heavy' in the context of air traffic control, particularly in a terminal environment. These specific designations are crucial because they indicate the size and weight category of an aircraft, which directly impacts its performance characteristics and the wake turbulence it generates.

Using the terms 'super' or 'heavy' is essential when dealing with super or heavy aircraft, as these aircraft have specific operational requirements and considerations. For instance, a 'heavy' aircraft is one that has a maximum gross takeoff weight of over 255,000 pounds, while a 'super' aircraft has a maximum takeoff weight exceeding 560,000 pounds, like the Airbus A380. Recognizing these classifications helps air traffic controllers manage spacing and separation between aircraft more effectively, ensuring safety and efficiency in air traffic operations.

In contrast, the other options suggest contexts where these terms may not be necessary or relevant. For instance, using these terms only during takeoff procedures overlooks their importance in various phases of flight, including landing and taxiing. Emergency instructions may require specific terminologies, but they focus more on the nature of the emergency rather than aircraft classification. Lastly, pre-flight checks are primarily about verifying aircraft readiness and compliance,