What does the designation F/A-18C/D refer to?

The designation F/A-18C/D refers specifically to the Hornet strike fighter. The F/A-18 is a versatile aircraft that is used for both fighter and attack missions, effectively combining the capabilities of air-to-air combat with air-to-ground strike capabilities. The "F" stands for fighter and the "A" stands for attack, allowing the aircraft to fulfill multiple roles in combat scenarios.

The "C" and "D" designations indicate different variants of the Hornet, with the C variant being a single-seat aircraft and the D variant being a two-seat model. Both variants share similar airframe designs and performance characteristics, contributing to their effectiveness in various operational contexts.

The other choices listed do not accurately represent the F/A-18C/D. The Super Hornet, for instance, refers to a later and larger version of the Hornet series known as the F/A-18E/F, distinguishing it from the original Hornet. Similarly, signals intelligence and long-range ASW aircraft designations refer to entirely different aircraft types and roles, which do not align with the capabilities or specifications of the F/A-18C/D. Thus, the designation specifically denotes the Hornet strike fighter.