Which of the following is NOT a pre-training OC/T duty?

The task of observing a unit's performance during missions is typically associated with the execution phase of training rather than the pre-training duties of an Observer-Controller/Trainer (OC/T). Pre-training duties focus on the preparation and setup required to ensure that a training exercise runs smoothly and effectively.

Conducting safety briefs, making final checks on training devices, and placing the Opposing Force (OPFOR) and role players in position are all essential activities that help set the stage for a successful training environment. These tasks are crucial for creating a safe and well-structured training exercise. In contrast, observing the performance of units is primarily an assessment function that occurs during the training execution itself, making it a duty that happens after the pre-training preparations are complete. This distinction highlights the responsibilities of OC/T in preparing for training versus assessing performance during it.