How long before jumping should the oxygen hoses be unplugged?

• A. 10 seconds
• B. 30 seconds
• C. 1 minute
• D. 2 minutes

Answer: (B)

The oxygen hoses should be unplugged 30 seconds before jumping to ensure that the jumper has sufficient time to adjust and prepare for the jump while still receiving supplemental oxygen. This duration allows for a gradual transition from using oxygen to being in a free-fall environment, especially at high altitudes where the lack of oxygen can be detrimental to performance and safety. By unplugging the hoses 30 seconds prior, jumpers can effectively manage their oxygen levels and maintain their physiological readiness for the jump. This timing is essential to ensure that jumpers are not abruptly cut off from oxygen and can help mitigate the risk of hypoxia.

In contrast, unplugging the hoses too early could lead to heightened risks associated with altitude such as dizziness, impaired judgment, or decreased physical capability, as the body may not have adjusted fully to the reduction in oxygen. Hence, the choice of 30 seconds balances safety and operational efficiency effectively.