Which form is used to track personnel who are temporarily absent?

The correct choice for tracking personnel who are temporarily absent is DA Form 647-1. This form is specifically designed for monitoring soldiers who are on temporary duty (TDY) or otherwise absent from their unit for short periods. Utilizing DA Form 647-1 allows for effective management and accountability of personnel, ensuring the organization knows who might be away from their assigned duty stations and for what reason.

The other forms mentioned serve different purposes: DA Form 647 is generally used for tracking personnel actions but does not specifically address temporary absences in the same way as DA Form 647-1. The Leave Form 22 is used primarily for documenting leave requests and authorizations, rather than tracking temporary absence during TDY assignments. The TDY Request Form, while related to temporary duty assignments, is primarily a request and does not serve the same tracking function that DA Form 647-1 does.

Thus, the specific purpose of DA Form 647-1 aligns it perfectly with the need to keep an accurate record of personnel who are temporarily absent, making it the correct answer.