Whose responsibility is it to monitor the fuel state and G loading of the entire formation?

The responsibility for monitoring the fuel state and G loading of the entire formation lies with the Formation Leader. This individual plays a crucial role in maintaining the overall situational awareness of the formation, which includes keeping track of not just their own aircraft's parameters but also those of other pilots within the formation. The Formation Leader is tasked with ensuring that all aircraft can safely operate under the mission’s guidelines, including factors such as fuel management and G limits that could affect the safety and effectiveness of the formation flying.

While other members, such as the Wingman or Number 2, have specific roles and responsibilities, their focus is often more localized to their own aircraft and immediate formations. The Formation Leader's broader oversight is essential for the collective safety and coordination of the group during various maneuvers and missions, making them the key individual responsible for monitoring these critical aspects of flight.