Once calibrated upon the desired target or bracketed area, a call for "fire for effect" is made – requesting several batteries or the battalion to fire one or more rounds, with the goal of saturating the target area with shell fragments.
In practice, first the Forward Observer (FO) establishes communication with the artillery unit.
Ideally the observations of the FO will be accurate enough to dispense with any ranging rounds.
This maximizes surprise and also limits the opportunity for the enemy to discover the position of the battery while saving ammunition.
Care must be taken that the auxiliary point is far enough from the target to obscure the real purpose.