What is the function of the portable backup console?

The portable backup console serves a critical role by bypassing the standard controls, specifically the joysticks, allowing operators to manage various systems effectively in situations where the primary controls may fail or become unresponsive. This feature is essential for maintaining operational capabilities and ensuring safety during emergencies or equipment malfunctions. By providing an alternative means of control, the backup console enhances the vessel's resilience and operational readiness, ensuring swift response actions can continue without interruption. Thus, its primary function focuses on maintaining control over essential systems when needed, which is why the selected answer is correct.