Originally Posted by
Mark in Rochester
In close air support, artillery, mortar, and naval gunfire support fires, it is the term included in the method of engagement segment of a call for the fire which indicates that friendly forces are within close proximity of the target, usually 600 meters however The close proximity distance can be determined by the weapon and munition fired.
Given the posture of the marines and the size of the detonation, it would appear to me that this is not air support, artillery, mortar, and naval gunfire support fires - more along the lines of a satchel charge type of detention. If they had called in some ordinance I would expect them to be on the ground before detonation