Which option correctly describes hangfire procedures for the M41A7?

• A. Fire trigger, pre-flight functions occur and nothing happens; 'MISFIRE' 3x, track for 60 seconds, 60 seconds are up; Disarm, lock the system; Range safety procedures - Move 50 meters to the flank and 100 meters to the rear; Notify RSO; Wait 30 minutes for the thermal batteries to die; Retrace 100 meters and 50 meters back to the missile; Keeping the missile pointed down range, take it 100 meters to the dud pit maintaining a clear backblast
• B. Fire trigger, pre-flight functions occur and nothing happens; 'MISFIRE' 3x, track for 60 seconds, 60 seconds are up; Disarm, lock the system; Range safety procedures - Move 50 meters to the flank and 100 meters to the rear; Notify RSO; Wait 30 minutes for the thermal batteries to die; Retrace 100 meters and 50 meters back to the missile; Keeping the missile pointed down range, take it 100 meters to the dud pit maintaining a clear backblast
• C. Disarm, lock the system; Fire trigger; Range safety moves - Move 50 m to flank; Wait 15 minutes; Retrace 100 m back
• D. Range safety procedures first; Fire again

Answer: (B)

Hangfire procedures are about safely handling a missile that failed to ignite on demand, with a potential for delayed ignition still present. The proper approach is to secure the weapon, keep it oriented in a direction that minimizes risk, and involve range safety officials before moving the round to a designated safe area.

After a hangfire is suspected, you verify that no ignition occurred and observe for a short period to rule out any immediate ignition. If no ignition happens, the next steps are to disarm and lock the system so the weapon cannot arm itself. Then follow range safety procedures: move to a safe distance—typically 50 meters to the flank and 100 meters to the rear—and notify the Range Safety Officer so the incident is documented and the range can be secured.

A critical part of the procedure is allowing time for any remaining electrical energy in the missile, such as thermal batteries, to dissipate safely. Waiting around 30 minutes is standard to ensure there is no residual energy that could cause an unexpected ignition during subsequent handling.

After the wait, you retrace your steps to the missile, then move it to a dud pit with a clear backblast path. Keeping the missile pointed downrange during the move minimizes risk if any residual ignition occurs and ensures the hazard is directed away from personnel.

This sequence—confirm no ignition, disarm and lock, conduct range safety checks and notify the RSO, wait for energy to dissipate, then relocate the missile to the dud pit with a clear backblast—best matches the proper hangfire protocol for the M41A7.