What is the command to indicate that shooting is to start?

The command "Commence firing" is the established phrase used to signal the start of shooting in JROTC air rifle practices. This command is clear and specifically designed to convey the initiation of the activity, ensuring that all participants understand it is time to begin firing.

In contrast, the other options do not hold the same formal significance in the context of range commands. "Ready, aim, fire" is actually a sequence of commands that instructs shooters on how to prepare for shooting but does not specifically indicate the start of the shooting event. "Begin shooting" and "Start the process" are both vague and lack the precision and clarity required for safety on the range. Using a standardized command like "Commence firing" helps maintain safety and order during shooting activities, ensuring that all participants are on the same page regarding when to start.