Which of the following is a component of a static-line parachute system?

• A. Closing loop.
• B. Seat belt buckle.
• C. Radar transceiver.
• D. Propeller blade.

Answer: (A)

In a static-line system, a fixed line from the aircraft hooks into a loop on the parachute rig so that exiting the aircraft automatically starts canopy deployment. The closing loop is that specific anchor point on the jumper’s harness/pack; when the jumper steps out, the static line yanks this loop, pulling the deployment bag and then the pilot chute to open the main canopy. That immediate, controlled action is what makes the system “static-line”—no free-fall pulling required to deploy.

The other items don’t serve in the deployment mechanism. A seat belt buckle is just a securing hardware on harnesses or seating gear, not part of how the parachute deploys. A radar transceiver and a propeller blade belong to aircraft systems, not to the parachute rig used by the jumper.