What is the definition of a cross feed system in fuel management?

The definition of a cross feed system in fuel management refers to an interconnected arrangement that allows fuel to be drawn from various tanks within the aircraft. This flexibility is critical for optimizing fuel distribution, ensuring balanced weight, and managing fuel supply during flight operations. In practice, this system enables pilots to use fuel from any tank as needed, which can be particularly useful in scenarios where one tank might be running low or if it's necessary to maintain proper center of gravity for safe handling of the aircraft.

This interconnected design stands in contrast to other systems that may either pull fuel exclusively from a single tank or require direct refueling from ground tanks, both of which would not permit the same level of operational flexibility. A cross feed system also does not pertain to in-flight fueling methods, as it focuses on the management and distribution of fuel that is already onboard the aircraft.