What is a potential hazard of improperly using supplemental oxygen during jumps?

• A. Reduced exit speed
• B. Hypoxia
• C. Increased aircraft weight
• D. Improper altitude maintenance

Answer: (B)

Using supplemental oxygen improperly during jumps poses a significant risk of hypoxia. Hypoxia refers to a deficiency in the amount of oxygen reaching the tissues, which can severely impair physical and cognitive function. When jumper altitude increases, the atmosphere becomes thinner, leading to a reduced partial pressure of oxygen. Proper use of supplemental oxygen helps mitigate these effects by ensuring that jumpers receive sufficient oxygen to maintain optimal physiological function.

Improper use may include not using supplemental oxygen at required altitudes, miscalculating the duration for which it should be used, or failing to correctly monitor its delivery. When jumpers do not receive enough oxygen, they can experience fatigue, decreased coordination, and impaired judgment, all of which can critically affect their performance and safety during a jump.

In contrast, reduced exit speed, increased aircraft weight, and improper altitude maintenance do not directly stem from the use of supplemental oxygen. While these factors are important in overall jump safety, they are not the primary hazards related to inadequate oxygen supply at high altitudes, making hypoxia the correct focus when discussing the dangers of improperly using supplemental oxygen.