What deduction is applied for an insufficient tuck during the 2nd flight of a vault?

A deduction of 0.3 is applied for an insufficient tuck during the second flight of a vault. This specific deduction reflects the importance of maintaining the correct body position through both flight phases of the vault. In gymnastics, a proper tuck position is critical for executing the vault effectively, as it contributes to both the aesthetic quality of the performance and the gymnast's ability to control the landing.

If the tuck is insufficient—meaning the gymnast does not bring knees adequately toward the chest or the form is not tight—it can impact the execution and safety of the vault. The 0.3 deduction serves to penalize the gymnast for these inconsistencies in form during the critical second flight phase, ensuring that judges uphold the standards for both technical skill and presentation.

The other dedications you might encounter for different aspects of performance may vary in their amounts, but the standard for an insufficient tuck during the second flight specifically warrants a deduction of 0.3 to reflect the degree of error compared to an ideal tuck position.