After a scuba dive that did not require a controlled ascent, and planning to fly, what is the minimum recommended waiting time before flying at cabin altitude of 8000 feet or less?

After a scuba dive that did not require a controlled ascent, and planning to fly, what is the minimum recommended waiting time before flying at cabin altitude of 8000 feet or less?

• A. 6 hours
• B. 12 hours
• C. 24 hours
• D. 48 hours

Answer: (B)

The main idea is that flying after a scuba dive introduces a risk of decompression sickness because the lower cabin pressure can cause dissolved nitrogen to come out of solution in the body. If the dive did not require a controlled ascent (no decompression stops), the minimum recommended waiting time before flying at cabin altitude up to 8,000 feet is 12 hours. This 12-hour interval gives most of the excess nitrogen time to off-gas while you’re still on the ground, reducing the chance of bubble formation during the flight. If the dive profile involved decompression stops or multiple dives, you’d need a longer wait—typically 24 hours or more—because the total nitrogen load is higher. So 12 hours is the baseline safe interval for a straightforward no-decompression dive before flying at that cabin altitude. If you notice any symptoms like joint pain, dizziness, or numbness, seek medical advice and delay flying further.

The main idea is that flying after a scuba dive introduces a risk of decompression sickness because the lower cabin pressure can cause dissolved nitrogen to come out of solution in the body. If the dive did not require a controlled ascent (no decompression stops), the minimum recommended waiting time before flying at cabin altitude up to 8,000 feet is 12 hours. This 12-hour interval gives most of the excess nitrogen time to off-gas while you’re still on the ground, reducing the chance of bubble formation during the flight. If the dive profile involved decompression stops or multiple dives, you’d need a longer wait—typically 24 hours or more—because the total nitrogen load is higher. So 12 hours is the baseline safe interval for a straightforward no-decompression dive before flying at that cabin altitude. If you notice any symptoms like joint pain, dizziness, or numbness, seek medical advice and delay flying further.