In flight, the ozone/cosmic radiation is how many times greater than on the ground?

• A. 50 Times Greater
• B. 75 Times Greater
• C. 100 Times Greater
• D. 200 Times Greater

Answer: (C)

At cruise altitude, the atmosphere provides far less shielding from cosmic radiation than at the surface. The higher you fly, the thinner the protective blanket becomes, so exposure to cosmic rays increases dramatically. In aviation training, this increase is described as a substantial multiple of ground-level exposure, much larger than the other options presented. That’s why this option is considered correct: it reflects the noticeably greater radiation environment encountered in flight. Remember, as altitude rises, the radiation dose accumulates over time, which is why crew members monitor occupational exposure.