What is the first correction to send when adjusting fire?

When adjusting fire, the first correction to send is the Observer Target Direction. This is crucial because it establishes a clear reference for the gun crew or fire support team to understand where to aim and direct their fire in relation to the observer's position. By providing the Observer Target Direction, the observer communicates the angle (in mils or degrees) that the target is located from their own position, which is essential for accurate targeting.

The trajectory, method of fire, and target description may be important subsequent details, but without the observer's direction, the other elements cannot be effectively utilized to calibrate the fire support accurately. Correctly delivering the Observer Target Direction sets the foundation for the remainder of the fire adjustment process, ensuring that follow-up corrections can be made effectively based on where the rounds are impacting in relation to the intended target.