Low Platelet Count and Diving
Before you dive, you and your doctor should consider some possible effects of having a low platelet count. In some cases, it may affect the body’s ability to clot properly in response to injury.
THE OFFICIAL MAGAZINE OF DIVERS ALERT NETWORK
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Panic Leads to Diver Fatality
AS A WILDLIFE OFFICER, I spend countless hours on the water. As an instructor for the National Association of Underwater Instructors (NAUI), I have also spent a lot of time teaching and diving.
Children and Diving
MINORS HAVE BEEN DIVING FOR DECADES, but the incidence of scuba diving injuries among them remains poorly studied.
Shallow-Water Blackout
I have learned to read the minute details of each athlete’s technique and interpret the impending risk that arises as they push themselves in pursuit of a personal-best performance.
Helium Gas Purity: What Is Pure Enough?
THE THREE GASES GENERALLY used in recreational and technical diving are oxygen, nitrogen, and helium. Nitrogen is the most abundant and is usually the default gas, but no one seems concerned about its purity, although the U.S. Compressed Gas Association (CGA) provides purity levels, or grades, for various applications.
Jennifer Hayes
READERS WILL KNOW THE BYLINE “David Doubilet and Jennifer Hayes” from scores of National Geographic magazine features. Working as a team they have photographed the wild ocean from the tropics to both polar regions and even some rather unusual aquatic realms in between.
Underwater Photography with Compact Cameras
MANY DIVERS DON’T WANT TO TAKE LARGE digital single-lens reflex (DSLR) housings or expensive mirrorless cameras on their dives. Their goal is to capture memories to show their family or post on social media, not to get the highest-quality underwater images.
Dive Knives and Cutting Devices
THE DIVE KNIFE IS AN ICONIC PART OF A SCUBA DIVER’S GEAR. Since the inception of diving as a recreational activity, the dive knife’s presence in a diver’s equipment has influenced the public image of scuba diving as a dangerous sport and placed its participants in a league of their own.
To Eat or Not To Eat Fish
SEAFOOD HAS LONG BEEN AN INTEGRAL PART of the human diet, and some people consider it to be an inexhaustible food source.