Which of the following is NOT one of the 9 points of adjustment on the harness assembly?

The vertical strap is not one of the 9 points of adjustment on the harness assembly. In parachuting and jump master training, the harness assembly is designed for safety and comfort during jumps, and the points of adjustment are crucial for achieving a proper fit. The nine points of adjustment typically include components like the chest strap, leg straps, and the main lift web, which help ensure that the harness is secured correctly around the jumper's body.

A chest strap is important for maintaining stability and keeping the harness in place, while the leg straps are crucial for securing the jumper's legs to the harness. The main lift web helps distribute the load across the torso, ensuring that the parachute deployment system functions efficiently. Each of these components plays a significant role in enhancing both safety and performance during parachute operations, making their adjustment vital for effective harness operation. In contrast, the vertical strap does not exist as a recognized adjustment point in standard harness assemblies.