Which system allows situational awareness between joint forces and Army headquarters with access to the joint COP?

The correct choice is based on the functionality and purpose of the Global Command and Control System – Army (GCCS-A). This system is specifically designed to facilitate situational awareness among joint forces and the Army headquarters. It integrates data from various sources to provide a comprehensive common operational picture (COP), which is essential for effective decision-making and coordinated operations among different military branches.

GCCS-A/J enhances the ability to share information and maintain an up-to-date understanding of the battlefield environment, focusing on joint operations. This capability is vital when multiple forces are operating together, as it allows for efficient communication and situational awareness that is critical for mission success.

In contrast, options such as ARL-E, CDS, and CPOF serve different functions or may not provide the same level of integration and focus on joint operational capabilities. For instance, CPOF primarily focuses on command post operations and visualization of the battlefield but does not serve the same overarching purpose as GCCS-A/J in terms of joint force coordination and situational awareness across the Army and joint forces. Thus, GCCS-A/J stands out as the solution that directly addresses the need for situational awareness in the context of joint operations.