What FDC command will the FO receive after sending a CFF as "At My Command" or "By Round, At My Command"?

The command that the forward observer (FO) receives after sending a Call for Fire (CFF) as "At My Command" or "By Round, At My Command" is "Ready." This indicates that the firing unit is prepared to execute the fire mission once the FO gives the command to fire.

In this scenario, the term "At My Command" signifies that the FO wants to retain control over the timing of the fire. Therefore, the "Ready" command reassures the FO that the artillery unit is set up and ready to fire but is awaiting the specific command to do so from the FO. This command provides a crucial step in maintaining effective control of the firing process, allowing the FO to deliver accurate and timely support as needed.

The other choices, while relevant in different contexts, do not apply to the situation described with "At My Command." "Laid," for instance, refers to the positioning of the weapon system for firing, "In Position Ready to Fire" implies that the unit is ready but may not account for the FO's command control setup, and "Aimed On" signifies that the weapon is correctly aimed toward the target but does not encompass the entire readiness process indicated by the "Ready" command.