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Posts with the category “alert-diver-summer-editions”

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Underwater Photography with Compact Cameras
November 19th, 2023
As in nature photography, perspective and background are crucial in underwater photography. The correct exposure and the right motif are also required. If you photograph a fish’s tail fins only from b...  Read More
by DAN Team
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Chuck Davis: The Blue in Black and White
April 30th, 2023
He is famous as a master of underwater black-and-white photography, but I assumed he shot digital and converted his files to black and white in Lightroom or Photoshop. Digital tools have become standa...  Read More
by DAN Team
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The Philipines: Go where the wild things are
April 30th, 2023
When you dive the Philippines, you are not just a tourist — you are collaborating to bring awareness to some of the most important reefs in the world. We hope to see you there....  Read More
by DAN Team
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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
by DAN Team
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Regulators: CE marking and warranty
December 4th, 2022
CE marking does not mean that all CE-marked regulators are the same. It only tells us is that a regulator meets the minimum requirements for underwater breathing equipment. Performance still varies d...  Read More
by DAN Team
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Distraction, Discomfort, and Disorientation
November 27th, 2022
Seasickness affects many divers, and travel-associated disruptions to diet and schedule can also lead to queasiness. While it may be reasonable for a diver with nausea to enter the water to see if the...  Read More
by DAN Team
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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
by DAN Team
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Rebreather Myths
August 22nd, 2022
A set of double steel cylinders like what technical divers commonly use weighs more than 100 pounds, while a CCR is about 50 pounds depending on the model. But that’s not the complete picture. Double ...  Read More
by DAN Team
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Fin Foot or DCS?
August 10th, 2022
If fin straps are too tight or a diver forces his foot into the foot pocket too firmly, a steady mechanical pressure on the blood vessels may result. This is colloquially known as “fin foot.” ...  Read More
by DAN Team
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The Joys and Challenges of the Deep
July 8th, 2022
This year the CMAS Freediving Outdoor World Championship was held in Kas, Turkey. It was a great spot because of its marine environment and sea conditions which are very important when making challeng...  Read More
by DAN Team
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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
by DAN Team
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And They Dived Happily Ever After
July 6th, 2022
Being a woman in the male-dominated world of diving has its own, separate set of challenges, but they never scared us. We only found that they made us work harder. This is the message we want to bring...  Read More
by DAN Team
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Ensuring Safety in Freediving Competitions
July 6th, 2022
Freediving competitions present a significant logistical challenge, and it is typically the safety divers who are in charge of the daily setup and breakdown of the event equipment. This exposes the sa...  Read More
by DAN Team
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Bonaire Inspires Hope for the Future of Coral
July 3rd, 2022
One quality problem that Bonaire’s coral nurseries have encountered is an excess of coral. “One of the main bottlenecks is outplanting, which is time-consuming and requires a skilled diver,” Virdis sa...  Read More
by DAN Team
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Blenny Watching 101
July 3rd, 2022
Sweeping schools of snapper and grunts, legions of wrasses, and clouds of plankton-picking chromis greeted us on the reef each morning. But Anna’s sharp eyes, inherently attuned to the obscure, quicky...  Read More
by DAN Team
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Dive Boat Safety
July 3rd, 2022
All boat operators should follow a checklist for necessary equipment, including having the required items on board and ensuring they are in working order. Some of these should be easy to spot — life j...  Read More
by DAN Team
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A Little Detail
July 3rd, 2022
How did I end up with the hematoma? It was a coldwater day for a South Floridian, which is why I chose to wear a thicker wetsuit and hood, which are always stiff. When I descended, I performed the usu...  Read More
by DAN Team
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Unconscious Diver
July 3rd, 2022
Stop and think went out the window, and I acted. I jumped into the water with my damp wetsuit around my waist and swam to the diver, about 20 feet from the boat. My countless rescue exercises came to ...  Read More
by DAN Team
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Destination Antartica
July 3rd, 2022
The islands and ice are rich with diverse wildlife. You’ll catch stunning views of massive glaciers with aqua blue and teal veins running through them, and the ice’s textures are constantly changing. ...  Read More
by DAN Team
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Looking into the lungs
November 18th, 2021
When I started reading about breath-hold research, I realized that nobody had shown that a breath-holding human could conserve oxygen. There were, however, discussions about oxygen-conserving effects ...  Read More
by DAN Team
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Suseptability to Seasickness
August 18th, 2021
The inner ear houses the vestibular apparatus and the semicircular canals, which send information about balance, head position, motion and acceleration to the brain. These organs are sensitive to pres...  Read More
by DAN Team
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Lessons Learned While Lost at Sea
August 3rd, 2021
Understand the risks and that there are bad dive shops. I chose this shop because I found them on a dive association’s website as a highly rated dive center. The criteria that I had used to select a s...  Read More
by DAN Team
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Symbiosis on the Sand
August 2nd, 2021
The close living arrangement between weak-eyed alpheid snapping shrimp and sharp-eyed partner gobies is a classic example of symbiosis in the sea. Goby-associated snapping shrimp are master sand dwell...  Read More
by DAN Team
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California’s Squid Run
August 2nd, 2021
The dynamic spawning runs occur from April to November in Northern California and from October to May in Southern California. The commercial squid fishing industry concentrates its efforts along the C...  Read More
by DAN Team
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Diving in a Time Capsule
August 2nd, 2021
Known as Shipwreck Alley, this area has unpredictable weather, strong winds, dense fog and rocky shoals that have sent many ships to the lake bottom. Collisions, fires and ice have also contributed to...  Read More
by DAN Team
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Forging a Blue Economy
August 2nd, 2021
“The resort’s mission to protect the world’s richest reefs is meaningless if we do not take immediate and decisive action to reduce our carbon dioxide emissions and their resultant effects on climate ...  Read More
by DAN Team
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It Takes a Village
August 2nd, 2021
A 2009 survey by the Ocean Project revealed that young people care greatly about ocean conservation, are motivated to act and often influence adults’ opinions. Informal educational opportunities run b...  Read More
by DAN Team
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A Slugs Life
August 2nd, 2021
Waterman, who is possibly the only sculptor in the world who creates sea slugs from stone, further identified the importance of incorporating art into the exhibit: “Art can be an extremely useful tool...  Read More
by DAN Team
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DAN Member Profile: Tec Clark
August 2nd, 2021
Proper training, mentorship and many contact hours with students in the water are the keys to instilling values and creating better ambassadors for the sport, Clark said. Nobody is born a great diver;...  Read More
by DAN Team
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Hazards in Wreck Diving
July 29th, 2021
Nearly every ocean, sea and lake holds a world of shipwreck exploration for advanced open-water divers. Each lost ship, submarine, airplane and even the odd locomotive is a time capsule waiting for an...  Read More
by DAN Team
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Exercising After a Break
July 29th, 2021
There is no perfect time for a workout, and you have to balance all your daily requirements, but people who plan for and prioritize exercise are more successful in the long run. Plan for your workout ...  Read More
by DAN Team
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Outer- and Inner Ear Infections
July 29th, 2021
Trauma to the external canal disrupts the protective epithelium that, along with earwax, prevents infection....  Read More
by DAN Team
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Return to Freeding after Cancer Treatment
July 29th, 2021
Shallow water, however, does not always mean it’s safe. Your lungs must tolerate rapid changes of volume with the pressure at shallower depths, and the greatest changes occur in the first 33 feet (10 ...  Read More
by DAN Team
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Hiatal Hernia
July 29th, 2021
There is always some degree of DCS risk any time you dive, so take measures to minimize that risk. Continuously monitor yourself for signs and symptoms of DCS following a dive, and seek medical attent...  Read More
by DAN Team
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The Case of Catastrophic Kelp Loss
July 29th, 2021
Lessons learned from restoration efforts in the United States could help with kelp loss happening in Australia, Norway, Chile and elsewhere around the world. Divers can help by volunteering with proje...  Read More
by DAN Team
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Know the Risks
July 29th, 2021
Envenomation by certain box jellyfish can cause a rare condition known as Irukandji syndrome. An interesting case resulted when a diver experienced Irukandji syndrome in conjunction with nitrogen narc...  Read More
by DAN Team
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Shallow-Water Arterial Gas Embolisms
July 29th, 2021
The pressure change during ascent is greatest closer to the surface. But since it doesn’t take much overpressure to cause barotrauma, it can also occur if divers hold their breath at depth, especiall...  Read More
by DAN Team
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Shooting in a Turbid Environment
July 29th, 2021
Turbid water may not appear brown or green from the surface — in many cases the water looks entirely different once we drop in and begin the dive. All water is turbid to some degree. Understanding wha...  Read More
by DAN Team
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Surviving Triple Dangers in the Maldives
July 29th, 2021
If your breathing-gas supply is critically low, get to the surface at a safe ascent rate, and then monitor for signs of DCI. It is better to deal with DCI on the surface than to run out of breathing g...  Read More
by DAN Team
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Aw Inspired
July 29th, 2021
Those of a certain age frequently became enthused about scuba diving through the old black-and-white episodes of Sea Hunt. Somewhat younger people may have watched The Undersea World of Jacques Couste...  Read More
by DAN Team

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 2023
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