1. Launch Arma 3. Go to Editor. Place any artillery system that contains LG artillery shells. Spawn yourself as a quadrotor drone operator (can give yourself Zeus access to make next steps easier) and spawn a target such as a stationary tank or truck.

2. Set the drone to auto-hover where the turret maintains clear line of sight (LOS) on chosen target. Enter the artillery computer in chosen system and click within 50 meters of the target with LG shells chosen and fire (fire after the 'fire' button turns white in color as the system is orienting its gun to the chosen target location).

3. Quickly take control of the UAV turret after firing the shell and turn on laser. The shell fired by artillery computer should track with 100% accuracy if fired within 75m of target and prior steps are followed properly. The laser should not be taken off the target or toggled off and on after initially painting the target.

4. When repeating steps 1-3 with the use of manual firing (no artillery computer), LG shells fail to track the laser completely. Manual fire can be completed with the use of tools in mods such as the ACE 3 artillery rangetable, map tools, MicroDAGR, etc. or by clicking a spot to fire in the artillery computer, waiting for it to finish orienting (fire button turns white) and hitting Esc to exit the artillery computer view and clicking LMB to fire. LG shells end up landing at the initial point of aim when fired outside of the artillery computer regardless of the laser.

I was able to reproduce this error with 100% success with and without mods such as RHS and ACE 3. This seems to be an Arma issue as it is consistent in behavior even without mods. This was tested across the Mk.6 mortar, the 2S9 Sochor, the M4 Scorcher with and without mods loaded, and with RHS artillery systems. My milsim unit uses artillery systems with the artillery computer turned off and this renders the LG shells unusable for our use as the shells cannot properly lock on to targets even with precise calculation and aim.