What is the deduction for insufficient extension before landing on a vault?

The deduction for insufficient extension before landing on a vault is 0.3. This deduction applies when a gymnast demonstrates a lack of proper body positioning and extension as they prepare to land. Proper extension is crucial to maintain control and balance upon landing, and any significant observable lack of this can impact the overall execution of the vault. A deduction of 0.3 emphasizes the importance of preparing adequately for a strong and controlled landing, which is a critical aspect of vault performance in gymnastics. This level of deduction reflects the judges' focus on execution quality, rewarding gymnasts who fully extend their body and maintain proper technique throughout the vault.