In the modified Panera system, how many tanks are required for defueling aircraft?

In the modified Panera system, the design specifies that only one tank is required for defueling aircraft. This setup promotes efficiency and simplifies logistics, as a single tank can effectively manage the removal of fuel from an aircraft. The use of just one tank minimizes the complexity involved in operations, including the need for multiple lines and connections.

This streamlined approach helps ensure that defueling processes can be conducted quickly and safely, reducing the potential for contamination and enhancing overall operational efficiency. In aviation operations, having fewer tanks lowers the risk of fuel spills and accidents, making the system safer for personnel and the environment.

The other choices suggest a higher number of tanks which would complicate the operations, requiring more maintenance, space, and resources, and potentially increasing the points of failure or error in the fueling process.