Scuba Diving: The Risks Of Rising Too Quickly

When scuba diving, it is important to be aware of the potential risks of ascending too quickly. If a diver rises too quickly, they may experience a condition known as decompression sickness, which can be fatal. Therefore, it is important to follow the proper protocols for ascending after a dive, which typically involve rising no more than one meter per second.

Driving to and from elevations after a diving trip can be dangerous. Before attempting the climb, it is recommended that you wait at least 18 hours. In the big island, you can drive over saddle road and reach 6,600 feet instead of 1500 feet. The difference in risk is significant. I believe they are overly conservative, as I believe they are. It is not significant to increase the elevation from sea level to 1500 feet. It is critical not to rush to get back to your hotel room after the dive.

From the NDL to a deco dive or from a dive up to the NDL, the G is the dive. To fly or ascend to higher altitudes, Dan recommends elevations higher than 2,000 feet. When air reaches 1500 feet, it is less than 1 percent lower than sea level. You’ll have a difficult time finding even 40′ from the shore in Kihei. Furthermore, if you live at 1500′ and dive, it would further shade your baseline.

How Long Of A Rest Do You Need After Diving In Water?

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There is no definitive answer to this question as it depends on a number of factors, including the depth of the dive, the type of dive, and the person’s individual physiology. Generally speaking, however, it is recommended that divers take at least a 3-5 minute surface interval between dives to allow their bodies to recover.

You are free to go on your first dive whenever you want, but there is no set schedule. It is critical to be physically fit to dive in order to be successful. A lack of oxygen can lead to fatigue, improperly nourished meals, hydration issues, and generally disorganized diving situations on airplanes. Travel beyond a given time zone can be difficult, particularly if multiple time zones are crossed. If the pressure reduction is not slow enough at altitude, nitrogen dissolved in the solution may bubble out, resulting in residual nitrogen in your blood. In general, we recommend that a person’s surface interval of more than 24 hours be allowed prior to takeoff. As part of smart dive planning, you should make your final dives more conservative.

Divers must sometimes traverse mountains or higher elevations to access a dive site. If the aircraft’s pressurization system is maintained, the risk of climbing a 10,000-foot mountain is higher than flying. Divers Alert Network (DAN) is a 501(c)(3) non-profit medical and research organization dedicated to the safety and health of recreational scuba divers. If you need to call in an emergency for diving, dial the DAN 24-hour Diving Emergency Hotline at (919) 684-4DAN (available for collection).

Can You Fly At Low Altitude After Diving?

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Divers with the Dan (Divers Alert Network) recommend 24 hours for repetitive dives, the US Air Force recommends 24 hours after any dive, and the US Navy suggests only two hours before reaching altitude.”

The DAN recommends 12 hours of continuous diving (altitude 2,400 meters) if you are going for a single no-stop dive. Some people will be more aware of what they should be saying. 1,400 feet is quite a bit of ground to cover, and it will put you in a lot of pain. People drive over the top of Santa Rose (5000 feet) during their altitude dive to get a better view of the top. Group C is the best performer in the last 24 hours, and there’s no waiting. I’ll dive this weekend, but with Nitrox, I’ll be able to control my dive group as well. When flying over 1,000 or 2,000 feet, I assume he inquired about a non-pressurized cabin.

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In case of a depressurization, no pressurized airliner would experience an altitude excursion greater than 8000+ feet. In 34 years of flying business class, I’ve only had to use the oxygen mask twice. The altitude after a no-declaration dive (less than 2000 feet) is usually very benign.

Diving And Flying: The Do’s And Don’ts

It is always a good idea to follow the advice of a certified instructor when diving or flying. The best time to fly is at least 12 hours after a single no-decompression dive. The wait time may be extended by a day if you dive multiple times per day or by a week if you dive several times per day or by a week if you dive several times per day or by a week. Diver training at altitude should always be considered in high-altitude lakes, as the disease has a high risk of spreading if they are exposed to high altitudes.

Can I Drive Up A Mountain After Diving?

Mountain climbing should be avoided in the first 24 hours after a dive. In addition to mountain climbing and diving, be cautious about the possibility of DCS if you intend to go mountain climbing and diving. Climbing before diving is perfectly safe and provides an easy way to stay safe while swimming.

Bubbles can form during diving, and decompression sickness can occur when you go to the top of the mountain. When driving to the mountain, the recommended altitude wait is 12-24 hours before the dive, but it is affected by how many dives you have done. If you want to learn more scuba diving, you should consider booking a scuba diving liveaboard. His certification has been in place since 1999, and he has dived 78 times. During the course of four days in Mexico, he dived eight times at depths ranging from 82 feet (25 msw) to 94 feet (30 msw). He completed a 12 hour flight at 3,000 feet (904 meters) the next day in a pressurized aircraft. A DAN member called the DAN Diving Emergency Hotline to request assistance.

Divers Alert Network – DAN – is a term used to describe altitude changes after diving. Russell Bowyer was diagnosed with DCS-II and placed in the chamber to undergo treatment. Another 24-hour delay occurred the next day, when he made his way to the airport.

Why It’s Important To Ascend Slowly After Diving

To avoid decompression sickness, it is critical to ascend slowly after diving. The best way to accomplish this is to ascend at a rate of 30 feet per minute or less. During the final ascent, nitrogen gas will rise rapidly in the body, and allowing the body time to remove this gas will reduce the risk of decompression sickness. After diving, it is best to stay at the surface for a minimum of 12 to 24 hours before flying or traveling to a higher altitude. If you’ve completely recovered from mild decompression sickness, you should skip diving for at least two weeks.

Maximum Altitude After Diving

There is no definitive answer to this question as it depends on a number of factors, including the type of dive, the depth of the dive, the experience of the diver, and the conditions of the water. Generally speaking, however, the maximum altitude that a diver can safely ascend to after diving is 10,000 feet / 3,048 meters.

Going To Altitude After Diving May Be A Problem Because

Because you will most likely still have residual nitrogen in your system, going to altitude after diving may pose a risk of decompression sickness because nitrogen is an active component of the body.

At higher altitudes, diving at high altitudes is not without risk. In standard decompression tables, the pressure beneath the atmospheric surface is assumed to be less than sea level pressure, and thus less than atmospheric pressure at altitude. When the diver surfaces after the dive, the pressure within the environment decreases, causing compression stress on the diver. It is critical to adjust to new heights in order to reduce the overall risk before the event. In general, there is a three-day requirement at elevations greater than 10,000 feet (3000 meters). Low altitude may also expose the individual to cold injuries, acute mountain sickness, or elevations that cause pulmonary edema. As the density of seawater rises, so does the amount of pressure exerted by it.

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Diver’s depth gauges read less than zero at sea level and zero at altitude. Before diving, some gauges may be calibrated or returned to zero at altitude. A dive profile should be created to show how long acclimatization takes. Additional post-dive surface intervals (time spent at the dive’s altitude) should be planned. Degenerative illnesses have become more common as a result of the increased number of water-related activities. A diving expedition was led by the Pili volcano in Chile, which reached a height of 20,000 feet (6000 meters). John Bali, of Colorado, became the first person to scuba dive to the highest point in the continental United States during a dive in September 2013.

Diving in sea nomads is a biologically and genetic adaptation. Helium-oxygen diving is artificially simulate at high altitude. On dive computers, the user settings should be dependable in order to assist conservative diving. Algorithms for diving computers that are not available on the market have been tested. The diving depth at high altitudes can be quite high. This article discusses the effects of Res Sports Medicine on athletes.

What Is It Called When You Rise Too Fast From Deep Water?

Deep-water divers learn how to ascend in stages to equalize pressure.

An exhilarating sport, deep-water diving is made even more exciting by the frisson of danger. Certified divers take extra courses to receive deep-water dive certification — and that training includes a thorough grounding in the risks and safety procedures for descending and ascending to avoid uncomfortable or dangerous reactions to the changes in pressure. When you do come up too fast from a deep dive, you can experience decompression sickness — DCS — commonly called “the bends.” DCS is extremely painful and can be fatal.

Diving Deep

A deep-water dive involves depths of 60 to 130 feet, according to PADI, the Professional Association of Diving Instructors, the agency that dominates worldwide scuba certification. For a recreational diver, this usually means a wreck dive or a bounce dive — a dive to the bottom or deepest depth with the fastest possible return to the surface. Bounce dives are supposed to minimize the pressure problems you can encounter in deep-water dives but they still carry a degree of risk.

Nitrogen Bubbles and DCS

Deep diving places more stress on your body than shallow diving due to pressure differences and colder water temperatures. Pressure differences pose the greatest health risks, and it helps to understand why. The compressed air in your scuba tank is denser — you take in more nitrogen and oxygen molecules with each breath. Nitrogen, an inert gas, dissolves in your blood and tissues, and is eventually expelled from your body. But when you rise quickly to the surface from the depths, the resultant pressure drop causes the nitrogen to form gas bubbles in your tissues and blood, which blocks your circulation. Decompression sickness resulting from a too-rapid ascent can cause crippling joint pain, back pain, severe and sudden headache, tingling and numbness, dizziness, chest pain, disorientation, shock, paralysis, stroke and death. When immediate treatment is not available DCS can be fatal.

Emergency Treatment

Emergency treatment for a diver stricken with DCS requires dissolving the nitrogen bubbles by increasing pressure, or recompression. This takes place in a hyperbaric chamber, which controls the pressure and slowly lowers it to surface pressure as the dissolved nitrogen is normally exhaled. En route to a hyperbaric chamber, the stricken diver should breathe 100 percent oxygen from a mask. In mild cases, this may be enough to alleviate symptoms, although a medical evaluation is advisable. Some dive boats, such as research vessels that routinely serve as staging vessels for deep dives, have their own hyperbaric chambers, but recreational divers will most likely require emergency transport to a facility with a chamber. Delays in treating the bends can be costly, so it is important to know what safety provisions are available when you plan a deep dive.

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Deep dives deliver both aerobic and resistance exercise, and scuba diving is a relaxing stress-reliever. To enjoy the health benefits without taking undue risks, create your own prevention protocol for decompression sickness. Review your certification materials before each dive and skip the deep dives if you are severely overweight, pregnant, or have cardiovascular disease or lung problems. Don’t deep dive with a joint injury — nitrogen bubbles are painful enough to joints to cripple you. Ease off on alcohol consumption before diving and don’t cram a lot of repeat deep dives into one day. It’s better to wait at least 24 hours after a deep dive before flying, due to changes in cabin pressure. And, don’t assume basic wreck diving techniques are sufficient to prepare you for a deep dive. Wreck diving precautions in addition to thorough deep diving training will get you down and back safely.

  • PADI: Deep Diver
  • PBS: Survival Beneath the Surface

Benna Crawford has been a journalist and New York-based writer since 1997. Her work has appeared in USA Today, the San Francisco Chronicle, The New York Times, and in professional journals and trade publications. Crawford has a degree in theater, is a certified Prana Yoga instructor, and writes about fitness, performing and decorative arts, culture, sports, business and education .

Descending too fast??

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The US Navy Diving Manual specifies a maximum descent rate but it goes largely ignored if diving plain air.

If you’re diving air within normal recreational limits, clearing your ears is the only determining factor.

If you want to talk mixed gas it’s a different story.

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The Devil’s in the details.

Disclaimer: All discussion of value, by me or anyone else, is opinion.

For a comprehensive approach to diving education, check out Scuba Educators International (SEI) Diving.


Dr Deco


Messages 2,384 Reaction score 94 Location Issaquah [20 miles east of Seattle], Washington. # of dives I just don’t log dives

Descent Rate

The gas loads in the tissues of the body are developed though tests with a defined descent rate. During ascent, the decompression risk is determined for this gas loads. If you descend faster than the test divers, you will have more dissolved nitrogen in your body. If you are one of these individuals who are sensitive to DCS, this increase in dissolved nitrogen could possibly make a difference.

That is the answer from a decompression point of view. As you indicated, clearing your ears is an entirely different matter.

Dr Deco :doctor:

Readers, please note the next class in Decompression Physiology :grad:

Michael R. Powell, M.S., Ph.D.
“If a man empties his purse into his head, no man can take it away from him. An investment in Knowledge always pays the best Interest .” – Benjamin Franklin




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