If the observer wishes to control the time of delivery of fire, which method of control would the observer utilize?

The method of control that the observer would utilize to manage the timing of fire delivery is "At My Command." This method allows the observer to dictate precisely when the fire should begin, giving them control over the timing of the artillery strikes. Using this command, the observer can synchronize fire with other operations or actions on the battlefield, ensuring that the fire support is used at the most effective moment for maximum impact.

The other options, while they have their own purposes, do not provide the same level of control over timing. "Fire When Ready" means that the artillery unit will initiate the fire when they are prepared, which may lead to discrepancies between the observer's desired timing and the actual delivery of fire. "Repeat" is used to instruct the unit to fire the same mission again, and "Mark" typically refers to a method used to indicate a target without immediate control over firing time. Understanding these distinctions is crucial for effectively coordinating artillery support in combat scenarios.