Which system allows reporting on unit readiness and provides useful documentation for UDMs?

The system that allows reporting on unit readiness and provides useful documentation for Unit Deployment Managers (UDMs) is known as the DRRS, or Defense Readiness Reporting System.

DRRS is specifically designed to assess and report the readiness of military units, allowing for a comprehensive view of their capabilities and operational status. It serves as a critical tool for UDMs to document readiness levels, track resource availability, and analyze the overall preparedness of their units. By using DRRS, UDMs can ensure that all necessary data regarding deployment readiness is captured effectively, facilitating better decision-making and planning for missions.

While other options such as the AF Portal, AEF Online, and LOGMOD may provide valuable resources and information related to deployments, they do not primarily focus on the reporting and documentation of unit readiness to the same extent as DRRS. The AF Portal serves as an information hub, AEF Online focuses on the Air Expeditionary Force process, and LOGMOD deals with logistics management, rather than direct readiness reporting.