Flight crewmembers may not scuba dive within ____ hours prior to going on duty as a flight crewmember.

Flight crewmembers may not scuba dive within ____ hours prior to going on duty as a flight crewmember.

• A. 12
• B. 24
• C. 48
• D. 72

Answer: (B)

The question tests safety rules about scuba diving before flying due to decompression risk. After a dive, nitrogen remains dissolved in the body's tissues. If a person then flies, the cabin pressure change at altitude can cause that nitrogen to come out of solution and form bubbles, potentially leading to decompression sickness. To prevent this, crews must allow a waiting period between diving and going on duty. The established guideline is not to scuba dive within 24 hours before reporting for flight duty. This 24-hour buffer gives enough time for off-gassing across a range of dive depths and profiles, reducing the chance of decompression sickness once at altitude. Shorter intervals would increase the risk, while longer intervals aren’t required by the policy.

The question tests safety rules about scuba diving before flying due to decompression risk. After a dive, nitrogen remains dissolved in the body's tissues. If a person then flies, the cabin pressure change at altitude can cause that nitrogen to come out of solution and form bubbles, potentially leading to decompression sickness. To prevent this, crews must allow a waiting period between diving and going on duty.

The established guideline is not to scuba dive within 24 hours before reporting for flight duty. This 24-hour buffer gives enough time for off-gassing across a range of dive depths and profiles, reducing the chance of decompression sickness once at altitude. Shorter intervals would increase the risk, while longer intervals aren’t required by the policy.