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Posts with the category “dive-safety-tips”

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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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Gas Planning 101: How To Calculate Your RMV
December 4th, 2022
This article explains how to calculate your RMV from submersible pressure gauge (SPG) readings before and after the dive, the cylinder size, and the average depth and dive time logged by your dive com...  Read More
by DAN Team
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Silence in the Tower of Babel: a brief story about hand signals
December 4th, 2022
Communication underwater serve two main purposes, safety and decision making within the team. Safety-related communication entails assessing a divers condition, checking gauges, defining a depth, a le...  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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Adaptations we experience in freediving PART 1
October 15th, 2022
When trying to gain adaptation of the lungs for freediving it’s important to add depth gradually when training. Even if a diver had the confidence, relaxation level, and breath hold time to dive to 10...  Read More
by DAN Team
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Nutrition for scuba diving: practical advice to enjoy your dives!
September 20th, 2022
A diver should complete their regular daily meals i.e., breakfast, lunch, and dinner. The ideal meal before immersion should be lightweight and easily digestible, and should include sources of complex...  Read More
by DAN Team
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Blue Heron Bridge
September 15th, 2022
Don’t expect colorful reefs; prepare instead for a menagerie of unusual and exotic sea life you would typically have to travel the world to see. Every dive can be a surprise — you never know what’s lu...  Read More
by DAN Team
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Freediving: Seeking and Finding Our Limits
August 24th, 2022
I thought the freediving certification would simply teach me how to hold my breath for an impressive amount of time. But it was so much more than that, providing an invaluable lesson in the chemistry ...  Read More
by DAN Team
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Freedive with Psoriatic arthritis
August 10th, 2022
Metotrexate intake could put your student at a further risk for its side effects which includes lung tocixity and myelotoxicity. Hence you need to have your student’s fit to dive necessarily verified...  Read More
by DAN Team
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Good Air
August 10th, 2022
Experts have discussed whether air in a cylinder can actually “go bad,” but without any data, arguments for or against using the air after a prolonged period are purely speculative. ...  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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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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The Secret to Deep Freediving: Tips from 3 Female World Record Holders
July 6th, 2022
When we asked the guys how they felt when they dived to their deepest depths we received answers including “focused”, “deep relaxation”, and “joy.” Many freedivers experience different feelings and em...  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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Field Neurology for Divers
June 28th, 2022
Diving injuries involving the nervous system, including decompression sickness (DCS), arterial gas embolism (AGE) and ear barotrauma (EBT), are blessedly rare, but when they do happen, these condition...  Read More
by DAN Team
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Decompression Illness
June 28th, 2022
Decompression illness, or DCI, is associated with a reduction in the ambient pressure surrounding the body. DCI encompasses two diseases, decompression sickness (DCS) and arterial gas embolism (AGE). ...  Read More
by DAN Team
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What Drowning Really Looks Like
June 28th, 2022
The popular conception of what drowning looks like is not accurate. Unlike this photo, drowning people usually can’t call out for help, and there is very little splashing or waving. Drowning is actual...  Read More
by DAN Team
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How to Create an Effective Emergency Action Plan (EAP)
June 28th, 2022
The on-call staff at Divers Alert Network® (DAN®) answer more than 2,500 emergency calls each year. In many cases, the outcome may have been better if an effective emergency action plan (EAP) had been...  Read More
by DAN Team
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Teach your Divers to be Prepared
June 9th, 2022
DAN takes the guesswork out of emergency logistics. Once a member calls the 24/7 hotline, DAN arranges care — including evacuations and complex air travel arrangements if necessary....  Read More
by DAN Team
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Rely on Your Emergency Planning
May 30th, 2022
As a busy dive professional, you have to keep track of students and their individual needs, organize training logistics, evaluate water conditions, and keep track of an endless list of safety related ...  Read More
by DAN Team
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DCS and Denial
May 30th, 2022
DCS is often unpredictable, but regardless of the dive profile, a diver who has symptoms after diving should be evaluated by a doctor. If you ever suspect DCS, trust your instincts and don’t delay — ...  Read More
by DAN Team
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Be a Great Dive Buddy
May 30th, 2022
Throughout the dive, communication is paramount. Underwater, the pair must communicate clearly, effectively of course, wordlessly. Beyond understanding hand signals, an ideal buddy pair might even be...  Read More
by DAN Team
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Concussion and Return to Diving
April 7th, 2022
The best recommendation is to focus on your recovery and not resume diving during this period. Determining your seizure risk after your head injury is necessary before consideration for a return to di...  Read More
by DAN Team
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A Hole in My Heart
April 7th, 2022
During the summer of 2019, our group visited Lake Huron’s Thunder Bay National Marine Sanctuary in Michigan to dive the historic shipwrecks from the late 1800s that rest nearly intact in 160 to 200 fe...  Read More
by DAN Team
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A Sense of Purpose
April 2nd, 2022
Christy Pattengill-Semmens, Ph.D. As co-executive director of the nonprofit Reef Environmental Education Foundation (REEF) she oversees the Volunteer Fish Survey Project, one of the world’s largest an...  Read More
by DAN Team
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Pool Operation: Know Before you Go
March 30th, 2022
The challenge is keeping the balance in an ever-changing environment. Any pool built for public use, whether at an aquatic complex or a hotel, should have a certified pool operator (CPO) who has the k...  Read More
by DAN Team
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Pulmonary Hypertension and Diving
March 30th, 2022
A person’s preexisting condition and exercise intolerance will affect the heart and lungs’ ability to perform underwater. Various factors while underwater lead to intravascular volume shifts to the ce...  Read More
by DAN Team
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Laryngospasm and Anxiety
March 30th, 2022
If water entered the larynx, the epiglottis’ natural response would be to close the airways to prevent aspiration. The larynx would reflexively trigger coughing to expel the fluid, or you would try to...  Read More
by DAN Team
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Low-Visibility Diving
March 30th, 2022
It can be a fun experience to dive without seeing anything. When you need to rely totally on your ears and hands, you will be surprised by how quickly your body can adjust to the new situation. ...  Read More
by DAN Team
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Air and a Spare
March 26th, 2022
If you think a small bailout bottle is right for you, consider a few other issues. Maintenance requirements will be similar to those for a full-sized scuba tank, including hydrostatic testing, so you ...  Read More
by DAN Team
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Scuba Cylinder Rundown
March 26th, 2022
When choosing an appropriate cylinder size, consider factors such as the cylinder’s weight, your gas consumption rate, anticipated dive profile, personal comfort, and how much gas your buddy may need ...  Read More
by DAN Team
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When Should the Rescue Begin?
March 26th, 2022
When things go wrong, an effective rescue is vital for a favorable outcome. Most rescue diver courses teach students basic techniques to apply after something goes wrong, but better courses also provi...  Read More
by DAN Team
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Preventing Breathing gas Contamination
February 5th, 2022
Ask questions and be observant. If you are unsure about the breathing-gas quality at a fill station, ask questions about compressor maintenance, procedures and testing....  Read More
by DAN Team
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DIVERS LOSING ACCESS TO EMERGENCY CARE
February 3rd, 2022
The harsh reality is that the percentage of hyperbaric medicine programs introduced during the last decade that are available on a 24/7 basis to treat divers and these other emergent conditions has co...  Read More
by DAN Team
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UNCERTAINTY AFTER DIVING: Case Report and Recommendations #3
February 3rd, 2022
Diagnosing DCS is generally a process of ruling out other causes. It is imperative that we not discount the possibility of nondiving-related injuries or illnesses just because someone was diving. Howe...  Read More
by DAN Team
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UNCERTAINTY AFTER DIVING: Case Report and Recommendations #4
February 3rd, 2022
The signs and symptoms of DCS are not exclusive to that condition. However, when a person experiences signs or symptoms after diving, DCS is very often presumed to be the diagnosis. This is not all ba...  Read More
by DAN Team
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UNCERTAINTY AFTER DIVING: Case Report and Recommendations #2
February 3rd, 2022
Medications can also affect your ability to function normally, regardless of whether you’re on land or underwater. Common seasickness medications, for example, come with advisories stating that they m...  Read More
by DAN Team
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WOMEN’S HEALTH & DIVING
January 21st, 2022
Men and women, however, are physically and physiologically different. With women representing about third of the recreational diving population — in 2013 the Professional Association of Diving Instru...  Read More
by DAN Team
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LIONFISH STINGS
January 21st, 2022
Puncture wounds by lionfish can cause pain lasting for several hours, rapid edema (swelling) and subcutaneous bleeding. Swelling typically clears in two to three days, while the tissue discolorations ...  Read More
by DAN Team

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 2022
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