What is used for finding a marshal point during Case II?

The correct choice for finding a marshal point during Case II is FB, which refers to the "Final Bearing" or a specific reference point used in formation of aircraft during this particular operational scenario. During Case II operations, which take place in low visibility conditions, the FB provides essential guidance for aircraft as they approach the carrier for landing. Adhering to the FB ensures that aircraft can safely navigate to a known point before proceeding into the next phases of landing, especially given the challenges posed by limited visibility.

In this context, BRC, which stands for Base Recovery Course, is relevant for understanding recovery patterns but it doesn’t directly point to the method of locating the marshal point in the nuances of Case II operations. Similarly, while heading and track vector are both important navigational terms used by pilots and air traffic controllers, they do not specifically depict the sequential process for determining the marshal point in this particular scenario, making FB the most accurate choice.