If nose cannulas are used, what is the recommended action regarding the cannulas 30 seconds prior to exit?

• A. Removed and secured
• B. Plugged back into the oxygen hoses
• C. Unplugged from the oxygen hoses
• D. Worn in free fall

Answer: (D)

Using nose cannulas during free fall is critical for maintaining oxygen supply, particularly when altitude drops can lead to hypoxia. The recommended action of leaving the nose cannulas worn in free fall ensures that the jumpers continue to receive supplemental oxygen while descending.

This is especially important during high-altitude jumps or in situations where the atmospheric pressure rapidly changes, as it helps to sustain adequate oxygen levels in the bloodstream. Removing or unplugging the cannulas prior to exit increases the risk of hypoxia during the critical moments of the dive, potentially compromising safety and performance.

In addition to this, if cannulas were plugged back into oxygen hoses or secured, this would not provide the needed oxygen in the descent phase, rendering them ineffective for jump operations. Thus, keeping the nose cannulas on during free fall is the correct procedure for ensuring a safe and effective jump.