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

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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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Operation Rising Sun
July 29th, 2021
In the dark of night on the open Atlantic Ocean in 1944, a group of U.S. Navy anti-submarine ships searched for a clandestine meeting between German and Japanese naval crews. Operating on captured int...  Read More
by DAN Team
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An Insider’s Guide to Roatán
July 28th, 2021
Roatán also offers convenient and low-maintenance diving. The waters are clear, blue, calm and typically not subject to strong currents. The short, easy boat rides provide a lot of scheduling flexibil...  Read More
by DAN Team
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Magic in the Gulf
July 28th, 2021
Near the turn of the 20th century, fishers described the two picturesque reefs full of colorful marine life about 100 miles south of the Texas–Louisiana border as “flower gardens,” and the name stuck....  Read More
by DAN Team
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Fitness Myth or Fitness Fact?
April 15th, 2021
1 August 2016 | Author: Jessica B. Adams. Ph.D. When planning an effective fitness program, it is important to separate fact from fiction. Fitness folklore spreads quickly because many people are dra...  Read More
by DAN Team
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Prescription Dive Masks
December 8th, 2020
To understand the options for divers who require refractive correction, a basic knowledge of how the eye works is helpful. Light enters through the cornea, where the focusing process begins, and passe...  Read More
by DAN Team
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Volunteer Fish Surveys: Engage Divers
July 3rd, 2020
The REEF Volunteer Fish Survey Project represents the world’s largest database of marine-life sightings, containing more than 250,000 surveys to date. Divers and snorkelers of all ages and experience ...  Read More
by DAN Team
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Dive Deprivation
July 3rd, 2020
These are hard economic times for the dive industry. These are hard emotional times for recreational divers too. We don’t want to stop diving, but even places you can drive to, such as the Florida Key...  Read More
by DAN Team
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Travel Smarter: PRE-TRIP VACCINATIONS
June 2nd, 2020
Protecting yourself from disease involves not only staying in good shape, getting enough sleep, maintaining adequate nutrition and hydration and practising proper hygiene but also ensuring you are up ...  Read More
by DAN Team
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Group Fitness at the Pool
February 3rd, 2020
Many water aerobics programs involve time in both the shallow and deep ends of the pool. Participants in deep-water classes wear a flotation belt to keep them above the surface at all times. Shallow-w...  Read More
by DAN Team
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Suspension Training -The world is your gym.
January 22nd, 2020
Since a stable core is essential for all in-water movements, these core-blasting exercises are perfect for scuba divers....  Read More
by DAN Team
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Cultivating Conservation
November 10th, 2019
As scuba divers we are responsible to take action to protect the environment . Divers will rather visit marine protected areas where they can see more fish, more vibrant coral reef, better water quali...  Read More
by DAN Team
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Exercise drills with Dowels
November 10th, 2019
Strengthening hip and back extensors will help you fin with ease and minimize your risk for developing back pain. Hip- and knee-extension strength is important for standing up while weighted with scub...  Read More
by DAN Team
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Emergency Planning: Practicing the Plan
October 3rd, 2019
Your team needs to understand the situation and be able to prioritize actions when faced with emergencies. While risk will always be present, improved knowledge, understanding and preparedness remain ...  Read More
by DAN Team
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Recompression Chamber Safety
October 3rd, 2019
Instead of simply listing requirements relevant to the safe recompression of injured recreational divers, DAN identified real, likely hazards, quantified their significance and presented mitigation gu...  Read More
by DAN Team
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Air Hoses: A Closer Look
October 3rd, 2019
In our ongoing effort to learn more about these hose failures, we consulted the manufacturers. A major supplier expressed great concern about the reports and asked that we share as much information wi...  Read More
by DAN Team
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Protect your Environment
September 30th, 2019
Dive businesses, professionals, divers and the broader dive community should be aware of the harm their activities could cause. Pollution, damage, invasion by non-endemic life-forms, removal of protec...  Read More
by DAN Team
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Piston or diaphragm: Does it matter?
September 26th, 2019
The most important factor in a properly working regulator is not what you use but how you use it. Personal preference can guide your purchasing decision; modern regulators from a quality manufacturer ...  Read More
by DAN Team
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DAN was there for me.
September 6th, 2019
Be sure to go over emergency procedures in every dive briefing. ...  Read More
by DAN Team
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The Paper Nautilus
September 5th, 2019
Paper nautiluses, also known as argonauts, come to the surface at night to mate and to trap air in their shells to use for buoyancy....  Read More
by DAN Team

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 2021
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