What should be clearly labeled on the One-Way Voice Communication System's main control panel?

The main control panel of the One-Way Voice Communication System is a crucial interface that operators interact with during emergency situations. Therefore, it is essential that emergency instructions and operation guidelines are clearly labeled on this panel. These instructions provide immediate guidance to the operator on how to use the system effectively when time is critical. In emergencies, clear and direct information helps ensure that operators can quickly activate the system and communicate with personnel as needed, thereby facilitating a rapid response to the situation at hand.

While other options, such as system specifications or manufacturer information, are important for maintenance and support purposes, they do not directly enhance the operator's ability to respond in an emergency. Daily checklists might be beneficial for routine maintenance, but they do not serve the immediate operational needs of the system in a crisis.