How long must jumpers wait before performing a jump after donating blood?

• A. 24 hours
• B. 48 hours
• C. 72 hours
• D. 96 hours

Answer: (C)

Jumpers must wait 72 hours before performing a jump after donating blood to allow sufficient time for their body to recover from the donation. Blood donation can temporarily reduce blood volume and affect oxygen-carrying capacity, which may impact a jumper's performance and safety during a parachute jump. By adhering to a 72-hour waiting period, jumpers ensure that their physiological state has stabilized, thereby minimizing the risk of complications that could arise from the lack of adequate blood volume or hemoglobin levels needed for safe jumps. This standard is in place to prioritize the well-being of jumpers, ensuring they are fit and capable of undertaking the physical demands of jumping.