Which document is referred to as the duty log sheet?

The correct answer is DA 1594. This document is specifically known as the duty log sheet, utilized for recording activities and important information about duty status, assignments, and any incidents that may occur during a particular period. It serves as an official log to maintain a historical record of events that could be referenced later for various purposes such as accountability, evaluations, or incident reports.

In a military context, the DA 1594 is critical for non-commissioned officers and officers alike to ensure consistency in reporting and to create an accurate account for organizational needs. Information compiled in the duty log can also assist in leadership decisions and strategic planning.

The other documents mentioned serve different purposes: DA 6 is used for leave request forms, DA 31 is for requesting leave and passes, and DA 67-9 is the Officer Evaluation Report. Each of these has specific applications that do not align with recording daily duties or activities as required by a duty log.