Posts with the category “research”
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Immersion Pulmonary Oedema
November 29th, 2024
When we scuba dive or do other immersion-related activities, such as swimming or freediving, the hydrostatic pressure of the water pushes substantially more blood to the central part of our body, wher... Read More
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Swimmer's Ear
November 29th, 2024
All bodies of water are full of microorganisms, and any break in the skin provides a passageway for those microorganisms to enter the body and cause an infection. Diving in remote locations can be esp... Read More
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MEMBER PROFILE: RAY DALIO
November 29th, 2024
Dalio’s acquisition of the ship, a former oil field support vessel, was timely because the oil market had crashed, and the ship was only 5 years old. It had to be stripped and rebuilt at enormous expe... Read More
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Understanding Dive Equipment Regulations
November 12th, 2024
Consumer protection regulations require dive equipment manufacturers to specify service intervals to prevent failure. If you do not follow these guidelines and an unfortunate accident affects you or s... Read More
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Science Saves Sharks
November 12th, 2024
The field of shark and ray conservation in South Africa has grown exponentially, with many different organisations, research groups, officials, and public stakeholders dedicated to protecting our spec... Read More
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Freediving Risk Assessment
May 21st, 2024
Serious consequences have been linked to freedives that lacked the basic one-up-one-down rule, bypassed the buddy system, and pushed limits without proper safety measures.... Read More
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Southern African Sea slugs
May 21st, 2024
This approach to making a field guide makes its contents much more wide-ranging and considerably more accurate, particularly in terms of distribution, than a guide produced by the observations of only... Read More
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Disinfecting Dive Equipment
May 21st, 2024
We don’t have significant evidence of mass infections on dive boats, around dive sites, or in classrooms or retail shops, so it’s likely that the processes we followed played a major role in ensuring ... Read More
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Delving into Learning from Unintended Outcomes
February 6th, 2024
The guide addresses a spectrum of diving professionals—from commercial and military divers to those in media and academia—acknowledging the diverse organisational context in which they operate. The go... Read More
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ESOT Calculations
February 6th, 2024
How much oxygen is too much oxygen, and how do we understand and ensure we’re not risking more harm (i.e., oxygen toxicity symptoms) than good with how we manage treatments? It should be something we ... Read More
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To Eat or Not To Eat Fish
November 19th, 2023
While “line-caught” can refer to several methods that don’t use a net, I use the term to differentiate a single line and hook from the longline setup. Many people consider this method more sustainable... Read More
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Travel Smarter: Rental Gear
November 19th, 2023
Whatever equipment you use to dive, you need to know how to operate it before you submerge. If you have your own gear, comfort with it comes naturally over time... Read More
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River Diving
November 18th, 2023
Humans tend to be the most dangerous, both in their negligence to personal safety and in the dangers they leave behind. For centuries rivers have been the dumping grounds for trash. Broken bottles, ti... Read More
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Are rebreathers suitable for recreational divers? – Part 2
October 21st, 2023
The first advantage we looked at for the technical diver is gas duration. This is also a benefit for recreational divers. They may not be doing such long dives but for many divers their air consumptio... Read More
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Are rebreathers suitable for recreational divers? Part 1
October 21st, 2023
One of the biggest factors that comes into the decision to switch to a rebreather is costs. This has two aspects, the costs of the rebreather, including buying and maintaining it, set against the cost... Read More
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RESEARCHER PROFILE: Petar Denoble: Solving practical issues for divers
September 27th, 2023
We need to learn more about what constitutes individual variability. Because nitrogen bubbles have a role in DCS, at least in describing the severity of decompression stress, I would like DAN’s New Bu... Read More
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Weight loss for divers
September 17th, 2023
Scouting the various diving medicine websites, I was delighted to find a handful of articles that suggest that hyperoxia (high partial pressures of oxygen - ppO2) might, in fact, be beneficial for fat... Read More
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Mismatched Scuba Valves to Cylinder Outlets
September 16th, 2023
While a valve with a M25 thread may initially appear to fit a ¾-inch NPSM cylinder neck, it will necessitate more force to tighten and likely not seal correctly, requiring significant over tightening ... Read More
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Underwater Crime Scene Investigators
September 16th, 2023
With advancements in forensic science and dive technology, more recoveries of evidence are successfully performed each year. Many items found underwater secure convictions against those who sought to ... Read More
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Liability in Context
September 16th, 2023
It's important to note that the availability and specific terms of these liability policies may vary among insurance providers. It's advisable to consult with an insurance specialist or broker to dete... Read More
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Kaboom!....The Big Oxygen Safety Issue
March 1st, 2023
Mirko suffered first, second and third-degree burns to 40% of his body in the resulting fire. Once outside, people rushed to him, and he realised that he needed to cool down his burnt skin. He acquire... Read More
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Cape Marine Research and Diver Development
March 1st, 2023
Cape Research and Diver Development is the brainchild of Mike Barron and Dylan Irion. The company is based on their previous work experiences at other worldwide marine research and conservation organi... Read More
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The Inhaca Ocean Alliance.
March 1st, 2023
Aside from being an opportunity to combine all the fields I love – sport, the ocean, community upliftment and childhood development – I had been nursing a deep wound for nearly a decade.
... Read More
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After the Accident
February 23rd, 2023
Only trained and certified practitioners should administer emergency oxygen and psychological first aid to individuals in need.... Read More
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Equaleasy - neoprene hoods and equalisation
January 2nd, 2023
While we are acutely aware of these annoyances (we don’t want to look like Marge Simpson, and we don’t want to readjust our mask strap every five minutes), the most worrying characteristic of hoods is... Read More
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Do I Need Medical-Grade Oxygen?
January 2nd, 2023
Purely from a safety and quality point of view, ABO can be used to fill USP oxygen cylinders, but not the other way around. You will need to do your own shopping for prices and availability, but ABO i... Read More
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Mike Bartick: Blackwater Beckons
January 1st, 2023
I was already obsessed with photography, and I was making money as a chef, so I could afford to travel to new and exotic dive destinations to practice my craft. I went to Indonesia, and Lembeh was my ... Read More
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Let's talk about… Gas Planning
December 4th, 2022
Given the discrepancy between what’s written in the books and what is talked about over beers, confusion is only natural. In this article, we’ll try to untangle things a little. We’ll introduce a gene... Read More
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Adaptations we experience in freediving PART 1
October 15th, 2022
When trying to gain adaptation of the lungs for freediving it’s important to add depth gradually when training. Even if a diver had the confidence, relaxation level, and breath hold time to dive to 10... Read More
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Could optimising a diver’s hydration and temperature improve their decompression safety?
September 25th, 2022
An astute researcher noticed that there was a slightly higher incident rate of DCS that would otherwise have been expected for those US Navy divers, who were involved in the salvage and recovery of th... Read More
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SAVE THE CENOTES
September 20th, 2022
An apocalyptic nightmare is threatening the fragile cenotes and underground water ways of Riviera Maya, the stretch of Caribbean coastline on Mexico’s northeastern Yucatán Peninsula.... Read More
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Mistakes and Bad Decisions
September 15th, 2022
It is a testament to DAN’s efficiency and reputation that the hospital didn’t once bother me about payment. I was on oxygen all night with occasional breaks for air since the hyperbaric doctor wouldn’... Read More
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The Ocean Less Traveled
September 15th, 2022
The ocean’s soothing sounds can easily lull us into serenity, but a community in dire need of conservation, research, and protection lies below the surface. The ocean’s health is in crisis, and marine... Read More
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The Edge of Extinction
September 12th, 2022
Sea otters are much more than just another pretty face. They are known as an indicator or sentinel species because what happens to sea otters reveals much about the conditions of the nearshore ocean w... Read More
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Preserving History: Leslie Leaney
August 24th, 2022
Why I’m a DAN Member:
My friends have always had my back during my adventures. DAN has had that covered, along with my left, right, and front. I’ve always had DAN as a traveling companion. Leaney has ... Read More
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When History Seemingly Repeats Itself: DIADEMA SEA URCHIN LOSS
August 24th, 2022
Scientists are currently working to determine the cause of death for this mortality event by examining tissue samples of healthy or diseased Diadema in collections from Grenada to Florida and Mexico t... Read More
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Freedive with Psoriatic arthritis
August 10th, 2022
Metotrexate intake could put your student at a further risk for its side effects which includes lung tocixity and myelotoxicity. Hence you need to have your student’s fit to dive necessarily verified... Read More
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Pushing the Envelope: New Research into the Physiology of Deep Rebreather Diving
August 2nd, 2022
Our knowledge of decompression and other physiological aspects of immersion relies heavily on data from a very large number of dives, the vast majority of which is relatively shallow. At depths down t... Read More
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GET BENT!
July 6th, 2022
What have we learned about DCI in the last thirty years? ... Read More
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Freediving Is About To Enter A New Era If Oxama Has Its Say
July 6th, 2022
I didn’t have a dramatic wake-up call underwater, but I began to feel a profound desire to improve underwater safety. At the beginning of 2017, Claudio, Vincenzo, and I were preparing for our next sum... Read More
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2024
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November
Get to know DAN Instructor: Dylan BowlesGet to know DAN instructor: Ryan CapazorioGet to know DAN Instructor: Tyrone LubbeGet to know DAN Instructor: Caitlyn MonahanScience Saves SharksSafety AngelsDiving Anilao with Adam SokolskiUnderstanding Dive Equipment RegulationsDiving With A PFOUnderwater NavigationFinding My PassionDiving Deep with DSLRDebunking Freediving MythsCryptic FishImmersion Pulmonary OedemaSwimmer's EarMEMBER PROFILE: RAY DALIOAdventure Auntie: Yvette OosthuizenClean Our OceansWhat to Look for in a Dive Boat
2023
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Terrific Freedive ModeKaboom!....The Big Oxygen Safety IssueScuba Nudi ClothingThe Benefits of Being BaldDive into Freedive InstructionCape Marine Research and Diver DevelopmentThe Inhaca Ocean Alliance.“LIGHTS, Film, Action!”Demo DiversSpecial Forces DiverWhat Dive Computers Don\'t Know | PART 2Toughing It Out Is Dangerous
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