Which of the following is a Call for Fire element?

• A. Observer ID
• B. Time of flight
• C. Target number
• D. Other information as required

Answer: (A)

Identifying the observer is essential because the Call for Fire must establish who is requesting the fire so the Fire Direction Center can verify, coordinate, and respond appropriately. The observer’s ID provides accountability and ensures the correct unit and location are served. Time of flight is data used to calculate firing solutions after range is known, not a defined field of the initial call. Target number is a targeting reference that may appear in plans, but it isn’t a standard element the observer is required to provide in a call for fire. “Other information as required” is flexible and not a fixed, ongoing element, whereas the observer’s identification is a mandatory, defining part of every call.