Where do JM duties occur?

The correct answer highlights the various environments in which Jumpmaster (JM) duties are performed, which are critical to the safety and effectiveness of parachute operations. Understanding these locations is essential for anyone involved in airborne operations.

The unit area is where pre-jump training and mission briefings take place, ensuring that all personnel are prepared for the jump. The departure airfield serves as the primary staging point for the jump, where JMs coordinate operations, manage logistics, and ensure all equipment is ready for the jump. In-flight refers to the actual time during the flight when Jumpmasters perform critical duties, such as ensuring proper sequencing and parachute deployment.

In contrast, the other options include locations that may not all be directly relevant to the execution of JM duties. For example, training sites may involve practice but are not exclusive to JM responsibilities, and air traffic control primarily handles airspace management rather than JM-specific tasks. Understanding the functions at the departure airfield, within the unit area, and during the flight directly connects to the core responsibilities of a Jumpmaster, making the chosen answer the most accurate reflection of the environment where these duties occur.