When conducting a prefire safety check, which knob is specifically mentioned for tightness verification?

During a prefire safety check, ensuring the security and functionality of the equipment is crucial for safe and accurate operations. The collar locking knob is specifically highlighted for tightness verification because it plays a critical role in securing the connection between various components of the artillery system. If the collar locking knob is not properly tightened, it can lead to instability or misalignment, which may compromise safety and performance. Ensuring that this knob is tightened helps maintain the integrity of the setup and prevents any potential malfunctions during firing.

This focus on the collar locking knob underscores its importance in maintaining operational readiness and safety, making it essential to verify its condition before conducting any live fire exercises.