When should the Captain submit the name of a senior firefighter's replacement?

The correct answer is that the Captain should submit the name of a senior firefighter's replacement within 3 days of vacancy. This timeframe is typically established to ensure that staffing levels are maintained efficiently and any gaps in personnel are addressed promptly. Submitting the name of a replacement within 3 days allows for a smooth transition of responsibilities and helps maintain operational readiness in the fire department.

This practice recognizes the importance of having a senior firefighter in place to lead new or junior members and ensures that there is no extended period without adequate leadership. A timely replacement also reflects the department's commitment to consistent operational effectiveness and member safety.

The other options, which suggest longer timeframes or specific dates, do not align with the urgency required in notifying leadership of personnel changes within the department. A delay could result in confusion, lack of accountability, or even safety risks if the vacancy is not addressed quickly.