What controls the missile once it has been fired?

• A. The seeker dome
• B. The propulsion unit
• C. Guidance electronics unit (GEU)
• D. The LTA

Answer: (C)

The missile is steered by its guidance electronics unit, which acts as the onboard brain for guidance. After launch, the guidance electronics unit processes data from the seeker and computes the real-time steering commands. Those commands are sent to the flight control actuators that move the fins, guiding the missile toward the target. The propulsion unit only provides thrust to get the missile moving; it doesn’t perform steering. The seeker dome is the sensor that detects the target, not the controller of flight. The launch tube assembly is just the launch interface and support structure, not involved in steering once the missile is in flight.