This article represents the views of the authors. The article has not been fact checked by myself, the Board of Directors or any member of the USA Dive Club.

Copyright Disclaimer under section 107 of the Copyright Act of 1976, allowance is made for “fair use” for purposes such as criticism, comment, news reporting, teaching, scholarship, education and research. Fair use is a use permitted by copyrightstatute that might otherwise be infringing.

Scuba Q & A: Common Questions Asked By Nondivers

By Linda Lee Walden

When you tell friends and co-workers that you’ve recently been certified to scuba dive, their immediate reaction is likely to be an incredulous, “Wow. You did? I’m not sure I could do that!”

This knee-jerk response is often closely followed by a rash of questions indicating intense curiosity mixed with a touch of apprehension and perhaps a fair amount of misinformation. This article answers several of the questions most commonly asked by those who haven’t tried scuba yet. You can consider it a primer for the would-be diver, the friend, co-worker or family member who you think might enjoy our sport. By acting as a scuba steward, you might help turn a nondiver into a new diver — and maybe your dive buddy.

Is it hard to learn to scuba dive?

As active recreational pastimes go, scuba diving is one of the easiest to learn. While you’re gliding around enjoying the underwater sights, you’re engaged in only three basic skills: floating, kicking and breathing. Of course, there’s more to it that becoming proficient at using the equipment and developing knowledge of scuba concepts and safety procedures, but if you can breathe through your mouth, chances are you can learn to scuba dive.

The necessary skills are not tough for most people to master. During scuba certification class, you’re taught the effects of increased water pressure and safe diving practices. You rehearse equipment related skills in a controlled water setting until you feel comfortable, as well as practice what to do if things don’t go as planned.

The bulky scuba gear worn by many divers may seem intimidating, but learning to use it is straightforward. If you’ve snorkeled, you’re already familiar with the mask, snorkel and fins. The scuba unit consists of an air cylinder containing compressed breathing gas, buoyancy compensator (BC) jacket to help you float on the surface and maintain your desired depth underwater, and a regulator for you to breathe through. The exposure protection keeps you warm when diving in cool-water environments.

You don’t need to be a strong swimmer or an athlete to scuba dive, but some degree of comfort in the water certainly helps. Even if you enter scuba training with less than total confidence in your water skills, by the time you receive your first certification card, your comfort level will be greatly increased.

Learning to scuba dive is mostly a matter of attitude. If you are motivated to step through the door into an exciting new world, then the experience will prove both energizing and confidence-building.

For the balance of this article from Dive Training Magazine use this link.

Scuba Q & A: Common Questions Asked By Nondivers - Dive Training Magazine | Scuba Diving Skills, Gear, Education

This article represents the views of the authors. The article has not been fact checked by myself, the Board of Directors or any member of the USA Dive Club.

Copyright Disclaimer under section 107 of the Copyright Act of 1976, allowance is made for “fair use” for purposes such as criticism, comment, news reporting, teaching, scholarship, education and research. Fair use is a use permitted by copyright statute that might otherwise be infringing.

A Guide to Ocean Conservation Organizations and Efforts

The ocean is the largest ecosystem on Earth — it is the planet’s life support system and is affected by overfishing, pollution, and habitat...

The ocean is the largest ecosystem on Earth — it is the planet’s life support system and is affected by overfishing, pollution, and habitat destruction, compromising its ability to sustain humans with food, livelihoods and climate regulation. In this article, we’ll take a look at some of the movements and organizations making waves in ocean conservation

Healthy oceans sustain life here on planet earth — our security, our economy and our survival all require and are dependent on healthy oceans. Oceans provide us with food – seafood makes up at least a sixth of the animal protein people eat.

Oceans produce the air we breathe and the weather we experience. The ocean produces over half of the world’s oxygen and absorbs 50 times more carbon dioxide than our atmosphere.

Oceans regulate our climate. Covering 70 percent of the Earth’s surface, the ocean transports heat from the equator to the poles, regulating our climate and weather patterns.

From hotel rooms to dive trips and fishing trips, from clothing and fishing gear, the oceans support jobs. It is estimated that the oceans are responsible for more than $282B in revenue in the U.S. alone.

The ocean and its coral reefs provide natural breakwaters to buffer and protect our shorelines. The reef’s rough surfaces and complex structures dissipate the force of incoming waves, helping prevent flooding, erosion, property damage and loss of life.

Because of the impact the oceans have on every minute of every day, and on our future, ocean conservation is more essential now than ever before.

Many factors are affecting our oceans health today. Sea temperatures are increasing and the warmer oceans cause corals to bleach and die. Oceans today absorb about one-third of the carbon dioxide sent into the atmosphere — about 22 million tons a day. Increased carbon means higher levels of acidification — about 30 times greater than previous norms. This higher acidity results in the disruption of calcium carbonate formation. This can affect whole ecosystems, such as coral reefs, which depend on the formation of calcium carbonate to build reef structure, which in turn provides homes for reef organisms.

Pollution is a key factor in our oceans health. Many pesticides and nutrients used in agriculture end up in the coastal waters, resulting in oxygen depletion that kills marine plants and shellfish. Factories and industrial plants still discharge sewage and other runoff into the oceans. Oil spills pollute the oceans. Air pollution is responsible for almost one-third of the toxic contaminants and nutrients that enter coastal areas and oceans.

Over fishing is also contributing to our oceans declining health. The United Nations Food and Agriculture Organization estimates that 31.4 percent of fish stocks are either fished to capacity or over fished.

A recent Dive Training article, The Sickly Seas: Reaping the Unwanted Harvest of a Plastic Overload outlines the problem of plastic pollution in our oceans and how it’s endangering marine life including seabirds, and the fact that humans are indirectly consuming plastics through the seafood we eat.

Ocean Conservation: Turning the Tide

There’s no shortage of factors affecting the health of our oceans, but there’s good news on the horizon, too. Out there, beyond the predictions, are legions of individuals, communities, businesses, non-governmental agencies and governments working to solve the problems. Let’s take a look at some of the people helping to make ocean conservation a reality.

For the rest of this article use the link below/

A Guide To Ocean Conservation Organizations And Efforts - Dive Training Magazine

This article represents the views of the authors. The article has not been fact checked by myself, the Board of Directors or any member of the USA Dive Club.

Copyright Disclaimer under section 107 of the Copyright Act of 1976, allowance is made for “fair use” for purposes such as criticism, comment, news reporting, teaching, scholarship, education and research. Fair use is a use permitted by copyright statute that might otherwise be infringing.

Did You See That? The Art of Observing Marine Life

By Marty Snyderman

The fish, a spectacularly colored grouper, paused and opened its mouth. Finning only slightly to maintain its position just a foot (30 cm) or so above the reef, this brightly colored red and blue-spotted grouper waited patiently for another fish, a cleaner wrasse, to provide its services. Within only a few seconds the cleaner approached and went to work, moving from the tail toward the head along the grouper’s body. The cleaner paused every few seconds to pick at the skin of the grouper.

Like other cleaner species, cleaner wrasses help rid groupers and other host animals of irritating ectoparasites that can be found on the skin of the hosts. In doing so the cleaners gain a meal while the host benefits by getting cleaned.

My dive buddy and I followed the grouper as it slowly moved down the reef. We watched as another fish, the same general size and shape as the cleaner wrasse, appeared. Looking quite confident that additional cleaning services were about to be rendered, the grouper paused and opened its mouth. In the blink of an eye, the fish I thought was a second cleaner wrasse swam up and bit a chunk of skin out of the side of the obviously startled grouper.

Clearly, the attacker was a mimic, a species that does a good enough job of imitating a cleaner species to fool groupers and other fishes into thinking the mimic is the real deal. It’s a risky business to try to fool well-equipped predators, but if well-done, the act of deceit can provide a mimic with a meal. If done badly, no more meals will be necessary. This mimic was a tiger blenny, a fact that, like the grouper, I realized only after the daring blenny had enjoyed its success.

After the dive I excitedly asked my diving buddy what she thought of the scene we had just witnessed, and much to my surprise, her only comment was, “that big fish sure is pretty.” At first I thought she was putting me on, but I soon realized that she had missed both the cleaning and the attack. She had noticed that the grouper had its mouth open rather wide, but she wasn’t sure why. She thought the fish might have been injured.

Observing marine life is like putting puzzle pieces together. When you look at one fish, you see only one piece of the puzzle. Yet when you connect the pieces — say a fish to its habitat and to other creatures within that habitat — you begin to see the inner workings of a marine ecosystem.

But how does one go from fish watcher to underwater naturalist? First, the more you dive, the more you will begin to see various subtleties, and the better observer you will become. You’ll find that your awareness of the underwater world increases with time, the number of dives and the variety of habitats you get to explore and enjoy. Second, it helps to learn about what’s going on under the waves so you are more likely to recognize the happenings that you encounter during your dives.

For the rest of this article, please use this link.

Did You See That? The Art Of Observing Marine Life - Dive Training Magazine | Scuba Diving Skills, Gear, Education

This article represents the views of the author.  The article has not been fact checked by myself, the Board of Directors or any member of the USA Dive Club.

Copyright Disclaimer under section 107 of the Copyright Act of 1976, allowance is made for “fair use” for purposes such as criticism, comment, news reporting, teaching, scholarship, education and research. Fair use is a use permitted by copyright statute that might otherwise infringing. Only Pictures, Leave At Most Bubbles? The Case for Wreck Preservation

Should artifacts be removed and recovered from shipwrecks, or should our underwater cultural heritage be left undisturbed? Regardless of what your choice is,, under which circumstances? These are the questions that Finnish CMAS instructor, and scientific diver Rupert Simon seeks to answer based on directives from UNESCO’s 2001 Convention along with several governments and training agencies.

Many years back, a fellow diver proudly showed me an amphorae (likely Roman) he had salvaged from a wreck in the Mediterranean Sea. Relatively recently, I watched a video in which a diver brings up an intact porthole from the bottom of the Baltic. Last December, I saw photos in a scuba blog that showed divers presenting their trophies—amongst them was a self-described “… avid collector of shipwreck artifacts.” These examples show that collecting artifacts from shipwrecks, which are de-facto archaeological sites of cultural heritage, is still common. I can’t help but wonder how the habit of collecting items from wrecks for personal benefit applies to the preservation goals taught throughout all main international scuba diving certification bodies. 

For the complete Indepth article use the link below.

Take Only Pictures, Leave At Most Bubbles? The Case for Wreck Preservation - InDEPTH (indepthmag.com)

This article represents the views of the author.  The article has not been fact checked by myself, the Board of Directors or any member of the USA Dive Club.

Copyright Disclaimer under section 107 of the Copyright Act of 1976, allowance is made for “fair use” for purposes such as criticism, comment, news reporting, teaching, scholarship, education and research. Fair use is a use permitted by copyright statute that might otherwise be infringing.

DIVING SAFETY

How Current Are Your Rescue Skills?

By Wally Endres and Christine Tamburri. 

When was the last time you had an in-water emergency while diving where your reaction saved a life? Maybe we should ask a more critical question: was it an event or was it actually an emergency? Are you a proactive or reactive diver? 

For the full article in InDepth magazine, please use the link below.

How Current Are Your Rescue Skills? - InDEPTH (indepthmag.com)

This article represents the views of the author. The article has not been fact checked by myself, the Board of Directors or any member of the USA Dive Club

. Copyright Disclaimer under section 107 of the Copyright Act of 1976, allowance is made for “fair use” for purposes such as criticism, comment, news reporting, teaching, scholarship, education and research. Fair use is a use permitted by copyright statute that might otherwise be infringing.

Understanding Oxygen Toxicity: Part 1

 Looking Back In this first of a two-part series, Diver Alert Network’s Reilly Fogarty examines the research that has led to our current working understanding of oxygen toxicity. He presents the history of oxygen toxicity research, our current toxicity models, the external risk factors we now understand, and what the future of this research will look like. Mind your PO2s!

For the entire InDEPT; article please use the link below.

Understanding Oxygen Toxicity: Part 1 – Looking Back - InDEPTH (indepthmag.com)

What to Do If You Have a Rash After Scuba Diving

This article represents the views of the author.  The article has not been fact checked by myself, the Board of Directors or any member of the USA Dive Club.

Copyright Disclaimer under section 107 of the Copyright Act of 1976, allowance is made for “fair use” for purposes such as criticism, comment, news reporting, teaching, scholarship, education and research. Fair use is a use permitted by copyright statute that might otherwise be infringing.

An unexplained skin rash can mean more serious problems

By Eric Douglas 

About an hour and a half after her second dive of the day, Jan’s buddy noticed a rash on Jan’s back and hip as she pulled her wetsuit down. They immediately alerted the dive crew.

The Diver

Jan was a 55-year-old diver who learned to dive for her 50th birthday. She made 15 to 20 dives each summer and was in overall good health.

The Dives

Jan and her buddy were on a daylong charter trip with three dives planned. They did two deep dives in the morning to explore an artificial reef. They planned for a shallower dive after a surface interval.

The Accident

After noticing the red and itchy rash on her back and side, Jan removed her wetsuit and took a warm shower. Cortisone cream relieved the itchiness, but her skin remained blotchy.

She called the emergency line at Divers Alert Network (DAN) after consulting with the crew, reporting no other signs or symptoms other than the rash. She had no dizziness, lethargy or loss of her ability to walk normally.

Jan skipped the third dive of the day and went to the emergency room once the boat returned to the dock.

Related Reading: The Risks of Forgoing Drysuit Training

Analysis

A sudden rash while diving could be sea lice or another ocean irritant, but the red-bluish discoloration underneath the skin indicated a likely case of skin bends.

Skin bends is a presentation of decompression sickness (DCS). It is a buildup of nitrogen in the tissues and bloodstream.

When a rash suddenly appears after a dive, especially a deep or long dive, it could signal a bigger issue and requires a full evaluation from a doctor trained in diving medicine. Look for areas of numbness or tingling in the body, extreme tiredness, feeling unsteady on your feet or even problems urinating.

Repeated instances of subcutaneous rashes or other more serious symptoms following diving may be a sign of a patent foramen ovale (PFO)—a hole in the heart wall between the upper chambers of the heart. Under the right conditions, it can allow blood from the venous circulation to pass into the arterial circulation. Nitrogen gas bubbles in the bloodstream would normally be filtered out by the lungs, but when they move into the arterial circulation, they can cause problems. Having a PFO is not a problem in everyday life, but it does increase the risk of more serious neurological DCS symptoms with diving. A surgical procedure can repair it.

Jan’s symptoms continued to resolve as she rested and hydrated. The emergency physician prescribed Benadryl, which seemed to help, but that doesn’t exclude the possibility of skin bends. With a potential DCS case, the boat crew should have administered oxygen.

Some divers make the mistake of diving even after symptoms appear. Jan wisely chose to skip the final dive. She returned to diving a week later but switched to nitrox and dived more conservatively.

Lessons For Life

• Pay attention to your body. When unusual symptoms appear within 24 hours of diving, be aware that you may have a diving-related injury, and consult with DAN.
• Understand the signs and symptoms. Learn what to watch for when it comes to decompression sickness.
• Learn how to respond. Rescue and oxygen first-aid training prepare you to identify and respond to a suspected case of DCS in your dive buddy or yourself.

This article represents the views of the author.  The article has not been fact checked by myself, the Board of Directors or any member of the USA Dive Club.

Copyright Disclaimer under section 107 of the Copyright Act of 1976, allowance is made for “fair use” for purposes such as criticism, comment, news reporting, teaching, scholarship, education and research. Fair use is a use permitted by copyright statute that might otherwise be infringing.

A “Handy” Way to Communicate: Using Hand Signals and Accessories to Communicate Underwater

COMMUNICATION IS THE act of exchanging information by signals or messages, including writing, talking and gesturing. The key word here is “exchange.” As we know, communicating clearly with someone is not always easy, even when the conversation is conducted using words spoken on dry land. For instance, if you are across a crowded, noisy room from the person you are trying to communicate with, they might not hear your message. Or if you’re speaking English to a non-English speaker, the message might not be understood even if the person is near enough for you to whisper in their ear. For solid communication to happen, your message must travel in a loop that sees it conveyed, received, understood, acknowledged and appropriately responded to. If the message gets hung up along the way, communication breaks down. This process becomes more complicated when we put a regulator in our mouth and jump into the water. For starters, having the regulator in our mouth makes talking difficult. Secondly, water makes sound waves go wonky, playing tricks on how we perceive sound underwater. This is why, as part of the Open Water Diver certification course, we all learn a variety of underwater hand signals commonly used in diving. In this article we’ll cover using hand signals and accessories for effective underwater communications.

Please use this DIVER MAGAZINE link below for the full article by  Barry & Ruth Guimbellot

Underwater Hand Signals - Dive Training Magazine (dtmag.com)

This article represents the views of the author.  The article has not been fact checked by myself, the Board of Directors or any member of the USA Dive Club.

Copyright Disclaimer under section 107 of the Copyright Act of 1976, allowance is made for “fair use” for purposes such as criticism, comment, news reporting, teaching, scholarship, education and research. Fair use is a use permitted by copyright statute that might otherwise be infringing.

Does The Sport Diving Community Learn from Accidents?

by Gareth Lock

Do we learn from accidents as a diving culture and, as a result, take the actions, where needed, to improve divers’ safety? Though we might like to think that’s the case, the reality is more complicated as human factors coach Gareth Lock explains in some detail. Lock offers a broad six-point plan to help the community boost its learning chops. We gave him an A for effort. See what you think.

For the complete GUE article, please use the following link.

Does The Sport Diving Community Learn from Accidents? - InDepth (gue.com)

A Primer on Underwater Navigation Technology - InDepth (gue.com)By Gabriel Pineda.  Ocean Plan’s Navigator Pro. 

This article represents the views of the author.  The article has not been fact checked by myself, the Board of Directors or any member of the USA Dive Club.

Copyright Disclaimer under section 107 of the Copyright Act of 1976, allowance is made for “fair use” for purposes such as criticism, comment, news reporting, teaching, scholarship, education and research. Fair use is a use permitted by copyright statute that might otherwise be infringing.

Underwater navigation seems like an obvious and useful extension of our dive computing capabilities. So why aren’t U/W NAV systems more prevalent? Former Shearwater director of sales and marketing Gabriel Pineda reviews the technology that exists today, discusses barriers to adoption, and offers some alternative approaches, including DIY solutions, to the problem of finding your way underwater.

For the entire GUE article please use the link below.

A Primer on Underwater Navigation Technology - InDepth (gue.com)