Which component attached to the control section is used to steer the AIM-120 in flight?

• A. Fins
• B. Rudder
• C. Stabilizers
• D. Flaps

Answer: (A)

Steering in flight is done by movable aerodynamic surfaces that create side forces and moments to steer the vehicle. On the AIM-120, the control section houses the actuated tail surfaces, and the fins are the surfaces that deflect to steer the missile left or right and adjust its flight path. Fins provide the primary steering authority by generating the necessary lift and moments about the center of gravity. Other surfaces like a rudder are typical on aircraft with a dedicated vertical tail, while stabilizers mainly help with stability and flaps control lift on wings, not steering in a missile. Therefore, the fins are the component used to steer the AIM-120 in flight.