What behavior is required of OTs when entering or exiting the flight room?

The requirement for OTs when entering or exiting the flight room is to call attention for any staff. This behavior emphasizes the importance of respect and discipline within a training environment. By calling attention, the OTs acknowledge the presence of staff members and demonstrate their awareness of military customs and courtesies. This action fosters an atmosphere of professionalism and attentiveness essential in a training setting, as it signals to the staff that the OTs are prepared to engage appropriately.

In contrast, the other options do not fully capture the expected level of military decorum required in such a context. While walking silently or saluting might exhibit aspects of respect, they do not convey the same level of engagement and recognition of authority as calling attention. Speaking only when spoken to may hinder proactive communication and the dynamic exchange that is often encouraged in training scenarios. Hence, calling attention stands out as the appropriate and expected behavior for OTs in this situation.