How do freedivers not get the bends?
Free divers really don’t have to worry about decompression sickness (the bends) because they are not breathing compressed air underwater. They are simply taking a breath of air at the surface, descending, and returning to the surface with that same breath of air. Things just go back to normal.
At what depth do you have to decompress?
The need to do decompression stops increases with depth. A diver at 6 metres (20 ft) may be able to dive for many hours without needing to do decompression stops. At depths greater than 40 metres (130 ft), a diver may have only a few minutes at the deepest part of the dive before decompression stops are needed.
What is a deep stop in diving?
A deep stop is a 30-60 second stop at 50% of the maximum depth for the dive and should be taken by anyone doing decompression dives, or diving near the NDL’s. Aquaviews Tip: A Deep Stop is not a substitute for your Deco Stop or Safety Stop.
How do you properly decompress?
12 Ways to Decompress after High Stress
Why must divers rise slowly?
A diver should ascend most slowly from his safety stop to the surface, even more slowly than 30 feet per a minute. Nitrogen in a diver’s body will expand most quickly during the final ascent, and allowing his body additional time to eliminate this nitrogen will further reduce the diver’s risk of decompression sickness.
What is ND limits in diving?
A no-decompression limit (NDL) is a time limit for the amount of time a diver can stay at a given depth. A diver who stays underwater longer than the no-decompression limit for his dive can not ascend directly to the surface but must pause periodically as he ascends to avoid a high risk of decompression sickness.
How do you calculate NDL?
Calculating NDL Time
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