Posts with the category “research”
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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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Four Tips For Staying Warm While Cold Water Diving
July 6th, 2022
The basic question in cold is how to maintain adequate thermal insulation without marked cold or heat strain and with minimal impairment on physical performance. 24-hour energy expenditure is increase... Read More
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Cardiac Arrythmias in Scuba Divers
June 13th, 2022
Sudden cardiac death, or SCD, is an abrupt, unexpected loss of heart function that results in fatality and often occurs in people who were previously presumed healthy. ... Read More
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Great White Scavengers
June 13th, 2022
White sharks actually earned their name during the whaling era because fishermen saw flashes of their white undersides as they ate whale carcasses. As a scientist, it’s cool when your observations and... Read More
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Teach your Divers to be Prepared
June 9th, 2022
DAN takes the guesswork out of emergency logistics. Once a member calls the 24/7 hotline, DAN arranges care — including evacuations and complex air travel arrangements if necessary.... Read More
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DCS and Denial
May 30th, 2022
DCS is often unpredictable, but regardless of the dive profile, a diver who has symptoms after diving should be evaluated by a doctor. If you ever suspect DCS, trust your instincts and don’t delay — ... Read More
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Be a Great Dive Buddy
May 30th, 2022
Throughout the dive, communication is paramount. Underwater, the pair must communicate clearly, effectively of course, wordlessly. Beyond understanding hand signals, an ideal buddy pair might even be... Read More
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Continuing Education Can Make You a Safer Diver
May 30th, 2022
Post-dive debriefs help solidify good practices and correct sub-optimal ones. Finally, don’t overlook the valuable connections you can make with other divers in your area. Lifelong learners make for g... Read More
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Environmental Stewardship
May 30th, 2022
When packing for a dive outing, bring reusable water bottles, bags, utensils, and straws. Choose means of sun protection that are less harmful to marine and aquatic life. The most environmentally sust... Read More
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Exploring Decompression Bubbles Using Advanced Ultrasound Techniques
May 30th, 2022
Bubbles known as venous gas emboli (VGE) can appear in the venous circulation during ascent due to the offgassing of nitrogen from the tissues. Normally the lungs are able to effectively filter them f... Read More
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Hypoxia Signatures in Closed-Circuit Rebreather Divers
May 30th, 2022
Malfunctions in closed circuit rebreathers (CCRs) can cause hypoxia if oxygen is not added to the breathing loop and the diver remains unaware of decreasing oxygen levels. Hypoxia, dangerously low ox... Read More
Categories
2023
January
March
Demo DiversCape Marine Research and Diver DevelopmentKaboom!....The Big Oxygen Safety IssueTerrific Freedive Mode“LIGHTS, Film, Action!”Scuba Nudi ClothingDive into Freedive InstructionThe Benefits of Being BaldThe Inhaca Ocean Alliance.Special Forces DiverToughing It Out Is DangerousWhat Dive Computers Don\'t Know | PART 2
April
July
August
September
Avoid Diving With EarplugsKwaZulu Natal shipwrecks: The ProduceDive in the Fast Lane with DPVsLearning from Success. Learning from MistakeLiability in ContextUnderwater Crime Scene InvestigatorsTravel Smarter: Personal Safety While TravelingDive Boat Etiquette – From Yachts to rubber ducksThe Parting ShotMismatched Scuba Valves to Cylinder OutletsPredive Warm-UpWeight loss for diversTara Panton's Cape NudibranchsRESEARCHER PROFILE: Petar Denoble: Solving practical issues for diversMonitoring Cardiac Health in Scuba Divers
October
2022
January
February
UNCERTAINTY AFTER DIVING: Case Report and Recommendations #1.UNCERTAINTY AFTER DIVING: Case Report and Recommendations #2UNCERTAINTY AFTER DIVING: Case Report and Recommendations #3UNCERTAINTY AFTER DIVING: Case Report and Recommendations #4DIVERS LOSING ACCESS TO EMERGENCY CAREPreventing Breathing gas Contamination
March
When Should the Rescue Begin?Celebrating Young and Old in Turks and CaicosScuba Cylinder RundownChasing WeedsUnderwater Smartphone PhotographyAir and a SpareUnderwater Photographer: Fred BuyleBuilding Better BalanceLow-Visibility DivingMore Than a Sore ShoulderNot Only for DivingLaryngospasm and AnxietyPulmonary Hypertension and DivingTitan Meets TitanicPool Operation: Know Before you GoThe Argonaut Octopus and the jellyfishShort but Beautiful Lives
April
A Sense of PurposeMexico’s Sardine RunHigh-Pressure Hose injuriesA Hole in My HeartGoing UpConcussion and Return to DivingMarfan Syndrome Recommendations.South African Sardine Run by Walter BernardisSouth African Sardine Run By ProdiveSardine Run Port Elizabeth by ProDiveSardine Run Port St Johns by ProDiveScuba Diving In Mauritius