Where are chocks and cones placed in the cordon?

• A. Chocks on the left side of the front wheel; cones at the roof and tail.
• B. Chocks on the right side of the front wheel; cones around the fuselage.
• C. Chocks on both sides of the front wheel; cones at wing ends, nose, and tail.
• D. Chocks behind the aft wheel; cones placed only near doors.

Answer: (C)

In the cordon around an aircraft, the goal is to keep the aircraft from moving and to clearly mark the outer hazards. Placing chocks on both sides of the nose wheel locks the aircraft in place so it cannot roll toward you or away during firefighting or rescue operations. Positioning cones at the aircraft’s extremities—wing tips, nose, and tail—creates a visible perimeter that warns personnel to stay clear of the most vulnerable areas and keeps access routes open for responders.

Other arrangements don’t provide the same level of stabilization or clear boundary definition. Chocks on only one side won’t prevent movement in all directions, and marking cones only around the fuselage or behind the aft wheel fails to highlight the critical extremities and could leave hazardous zones unprotected.