Which method for initiating fire control involves direct communication between personnel?

The method of fire control that involves direct communication between personnel is personal contact. This approach allows for immediate feedback and clarification, ensuring that instructions or commands can be effectively understood and carried out. When personnel are able to engage face-to-face or through direct verbal communication, they can adjust tactics quickly, respond to immediate conditions on the battlefield, and ensure that everyone is on the same page regarding the execution of fire control measures.

In contrast, the other methods described involve varying degrees of distance or lack of immediate interaction. Prearranged signals would rely on established cues or codes set up beforehand, which may not adapt well to changing situations without prior agreement from all parties involved. Digital messaging and radio transmission are further removed; while effective for relaying information, they depend on technology and infrastructure that may not always be reliable or available in the heat of combat. Thus, personal contact stands out as the most straightforward and effective means for ensuring clarity and coordination in fire control.