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“Pura vida!” our dive guide, Sergio, exclaimed with a relaxed smile. Eight dive buddies, Sergio, and I just had an incredible experience: A 35-foot-long whale shark swam a few feet over our heads at one of the better-known dive sites at Cocos Island, Costa Rica. It silently came and went, seemingly carefree, like a giant spotted apparition sliding out of sight into the deep blue.
TALK TO ANY HUMAN UNDER THE AGE OF 13, and they have probably been asked, “What do you want to be when you grow up?” I was just 3 years old when I knew I wanted to be a veterinarian. Growing up on coasts — first Cape Cod, Massachusetts, and then Southeast Florida — I […]
I WAS 13 YEARS OLD THE FIRST TIME I WENT SCUBA DIVING. My family was on a trip to Cancun, and my dad took me and my sister, Carrie, who was 11 at the time, for a scuba lesson. We did a low-risk resort-style dive, going no deeper than 25 feet. But we loved the […]
DAN EMERGENCY SERVICES RECEIVED A CALL via satellite phone from a liveaboard anchored off a remote island in the Galápagos. A DAN member was concerned about their bunkmate exhibiting symptoms following the day’s dive activities. The diver had completed four dives that day. Although she began to show symptoms following the second dive, the inexperienced […]
SURFACE MARKER BUOYS (SMBS) AND DELAYED SURFACE MARKER BUOYS (DSMBS) are common and essential safety devices. These brightly colored, inflatable tubes, sometimes called safety sausages, are critical pieces of equipment that divers should take on most dives. Divers most often use them as signaling devices to mark their locations below the surface and alert boat […]
IN THE PREVIOUS ARTICLE, we settled on the recommendation that equipment used to control any breathing gas mix containing 25 percent oxygen and above at typical scuba cylinder pressures should be designed and considered suitable for oxygen use. Possible debates aside, we’ll examine what oxygen cleaning means. How often should gear be oxygen cleaned, and […]
WHEN ASKED TO DESCRIBE THEIR FAVORITE COURSE, many divers will discuss the challenges and triumphs they experienced during their rescue class. Instructors often describe rescue as the most rewarding course they teach. It is often the first course in which divers begin thinking about others more than themselves, so it’s little surprise that it stands […]
IT WAS A BEAUTIFUL, WARM SATURDAY IN THE PACIFIC NORTHWEST. We were conducting two checkout dives for an advanced open-water course at a popular dive site in Puget Sound. I had just gotten some divers out of the water, and we were debriefing onshore as divers from a basic open-water class exited the water with […]
SHERRI FERGUSON, MSC, IS THE LAB MANAGER at Simon Fraser University’s hyperbaric chamber, located at an altitude of 1,200 feet on Burnaby Mountain in the outskirts of Vancouver, Canada. She is a scientist working in aerospace and dive research, an experienced recreational, technical, and commercial diver, and a mother. How did you get into diving? […]