Final answer:
The Base INTRO Program Manager updates the newcomer's information upon arrival using a software system or online application designed for maintaining personnel records.
Step-by-step explanation:
The question pertains to the procedures followed by a Base INTRO Program Manager to update personnel information for a newcomer. Upon the newcomer's arrival, the Base INTRO Program Manager will likely utilize a specific software system or online application to update the "Arrival Confirmation Off/Amn" application. This process involves inputting and filing the Airman's information.
The exact tool or platform used can vary depending on the specific military or organizational protocols in place. However, it is essential that the Program Manager has the appropriate access rights and knowledge of how to use the system effectively to ensure the incoming personnel's records are accurately and efficiently updated.