What is the purpose of the Involuntary Tour Extension tool?

The Involuntary Tour Extension tool is primarily designed to address funding constraints during unit rotations. This tool helps ensure that personnel are available to fulfill mission requirements without disrupting the operational readiness of the unit due to financial limitations. By allowing for the extension of a sailor's tour involuntarily, the military can manage resources more effectively and maintain necessary staffing levels in critical areas, particularly in times of operational need or budgetary challenges.

While the other options present various reasons for extending service or assigning personnel, they do not accurately capture the specific role of the Involuntary Tour Extension tool. The focus on funding constraints highlights the practical necessity of ensuring that units are adequately staffed and ready to execute their missions.