When using a radio, what should be identified first during transmission?

In radio communication, the first priority during transmission is to identify the receiver. This practice ensures that the intended recipient knows that a message is meant for them, which is crucial for effective communication, especially in emergency scenarios like fire suppression operations. By clearly stating the receiver's identifier at the beginning of a transmission, it reduces confusion and ensures that everyone on the channel can recognize who is being addressed. This helps maintain clear and efficient communication, particularly in high-stress situations where quick actions are required. Following this, the sender can introduce themselves and convey the message or location, but identifying the receiver first establishes the intended line of communication.