What does the initial deflection refer to in artillery terms?

The initial deflection in artillery terms refers to the first angle measurement taken for targeting. This measurement is crucial when aligning the artillery piece to ensure that it accurately points towards the intended target. Essentially, it involves calculating the angle through which the gun's barrel must be adjusted to hit the target based on its location relative to the gun position. This initial angle is determined by various factors including range, wind direction, and the trajectory of the projectile. Understanding this initial deflection is vital for effective artillery targeting, as it sets the stage for further adjustments that may be needed based on environmental conditions or additional data.