True or False: When conducting an immediate mission, the call for fire is sent in three transmissions.

The statement is false. In an immediate mission scenario, the call for fire typically requires only one transmission to communicate the essential information necessary for engagement. This single transmission is designed to be concise and clear, delivering the observer's location, target location, type of mission, and any other critical details. The use of three transmissions generally pertains to a more structured call for fire process, which may not be suitable during urgent or immediate situations where rapid response is paramount. Thus, the correct understanding of conducting fire support in such circumstances emphasizes the efficiency and timeliness of the information relayed, reinforcing the idea that a single comprehensive call is sufficient.