The fire control vehicle has a lock on the first Hunter Killer.
The loader keeps the cannon supplied with shells but the aiming, pointing and targeting are done by the fire control vehicle.
The Hunter Killer sees the cannon aiming at it. Who will fire first?
A hand held rocket launcher is readied to use against the first Hunter Killer. It has to be almost on top of him before he has a chance to penetrate the armor of the HK.