What is the purpose of the Safe & Arm (S&A) sequence in practice?

• A. It speeds up the engine of the missile.
• B. It calibrates the seeker in flight.
• C. It ensures the battery life is managed.
• D. It prevents accidental launch and ensures arming occurs only after correct handling and launch sequence.

Answer: (D)

Safe & Arm sequencing is the safety gate that prevents accidental firing by linking the arming process to intentional handling and a proper launch sequence. It keeps the weapon in a non-arming state until the operator performs the required steps and the system’s interlocks verify that everything is secure and ready. This safeguards against missteps, shocks, or faults that could otherwise arm the device or initiate a launch. In short, arming only occurs after the correct handling and sequence are confirmed, which is why this option best describes the purpose. The other ideas describe performance, seeker calibration, or battery management, which are not what Safe & Arm is for.