Which of the following is NOT a jump command for a CH-47?

In air operations involving the CH-47, various commands are used to ensure that jumpers can exit the aircraft safely and effectively. The commands have specific purposes and are designed to facilitate a well-coordinated jump sequence.

"Pull your chute" is not a standard command used in the jump sequence for a CH-47, as it implies the individual jumper is responsible for deploying their parachute at a certain time, which is not the case in a coordinated jump. Instead, jumpers rely on the parachute deployment mechanism that operates automatically or through their controlled actions once they've exited the aircraft. The other commands listed—regarding standing up, checking static lines, and hooking up—are integral to the jump process and are essential for ensuring jumpers are properly secured and ready to exit the aircraft safely.

Therefore, identifying "Pull your chute" as not being a jump command reflects an understanding of the structured nature of parachute operations, where individual actions are timed and regulated by commands to maintain safety and order during the jump.