What does the electronic safe, arm, and fire (ESAF) do in the FGM 148?

• A. It controls the initiation of the two motors, the detonation of the two warhead charges and is the principal safety device that prevents accidental ignition or detonation
• B. It powers the seeker electronics
• C. It adjusts the flight path
• D. It deploys the parachute

Answer: (A)

Electronic Safe, Arm, and Fire (ESAF) is the safety and arming interface for the FGM-148. It gates and initiates the missile’s propulsion and warhead functions, so the two motors ignite only after proper arming and a valid launch sequence, and the two warhead charges detonate only when the system is commanded and safe conditions are met. This makes ESAF the primary safeguard against accidental ignition or detonation.

It’s not responsible for powering the seeker electronics, it doesn’t directly adjust the flight path, and it doesn’t deploy a parachute. Those functions come from other subsystems.