What action must an employee take before transmitting on a radio?

To ensure effective communication and avoid disruptions on the radio, it is crucial for an employee to listen long enough to verify that the channel is not currently in use. This practice is fundamental for maintaining order in radio communications, as it helps prevent overlapping transmissions that can lead to confusion or missed messages.

When an employee listens before transmitting, they can confirm that the frequency is clear, allowing them to convey their message without interference. This protocol is essential not just for individual communication but also for coordinating activities safely and efficiently among multiple personnel using the same channel. The emphasis on being aware of the channel's status helps create a disciplined communication environment essential for operational safety.