What is the primary purpose of the wave-off before deployment?

The primary purpose of the wave-off before deployment is to ensure that the area is clear for deployment. When jumpers perform a wave-off, they are signaling to those around them that they are not ready to deploy their parachute yet, which helps prevent collisions during parachute deployments. This communication is crucial, especially in a jump where multiple parachutists are exiting at once.

While signaling other jumpers is an important aspect of the wave-off, the action is primarily about ensuring safety by verifying that the deployment area is free of obstacles or other jumpers. In this context, the wave-off is a precautionary measure that all jumpers should take seriously before deploying their parachutes. This is particularly vital given that being aware of one’s surroundings and ensuring a safe opening area can significantly reduce the risk of accidents or injuries during skydiving.

Checking altitude is more related to ensuring the jumper is at the correct height for deployment rather than the wave-off itself. Preparing for landing concerns the final stages of the jump and not the wave-off phase. While it's important to signal and check surroundings, the wave-off's core function is centered around readiness and safety for deployment.