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Scuba Diving: Most Popular Articles

These articles are the most popular over the last month.
Scuba FAQ: What Do You Wear Under Your Wetsuit,...
What do you wear under your wetsuit when scuba diving? Here are 10 options, from rash guards to pantyhose.
A Scuba Diver's Guide to Identifying Rays
What are the different types of rays a scuba diver may see on a dive? Learn about the difference between Stingrays, Manta Rays, Electric Rays, and Skate, as well as how to identify them on a dive.
Reef Fish Identification Guide - 20 Common...
Reef fish identification guide for scuba divers to common and interesting species in Florida and the Caribbean. Learn to identify Sergeant Majors (Abudefduf saxatilis), Porkfish (Anisotremus virginicus), French Grunts (Haemulon flavolineatum) and many more reef fish species.
The Most Common Scuba Diving Injury and How to...
Ear barotraumas are the most common injuries experienced by recreational scuba divers. Learn how to recognize, avoid and treat scuba diving ear barotraumas.
8 Ways to Prevent Your Scuba Diving Mask From...
Prevent scuba diving masks from fogging. New and used scuba diving masks need to be treated in different ways to prevent them from fogging.
10 Things That Change When You Start Scuba Diving
Scuba divers tend to exhibit behaviors and characteristics that are not common to the general population. How many of these apply to you?
What Scuba Divers Need to Know About Depth and...
Water pressure increases with depth. Water pressure effects almost all aspects of scuba diving, include equalization, buoyancy, bottom times, and the risk of decompression sickness (DCS). Review basic dive theory regarding depth and pressure in scuba diving.
Do Sea Urchins Have Venomous Spines?
Are sea urchins poisonous? Learn sea urchin facts, how to safely dive and snorkel urchins, and the first aid for sea urchin stings.
How to Equalize Your Ears for Scuba Diving
How do scuba divers equalize their ear pressure to avoid ear pain when diving? Learn about the Valsalva maneuver and other ear equalization techniques, as well as how to deal with common equalization problems.
Boyle's Law and Scuba Diving
Boyle's Law, PV=c, is useful in scuba diving because Boyle's Law helps scuba divers predict how air will expand and compress with water pressure. Read an explanation of Boyle's Law and how it applies to scuba diving.
The Difference Between DIN and Yoke Scuba...
What is the difference between DIN and Yoke scuba regulators? The difference between a DIN and a Yoke regulator is the way it attaches to a scuba tank.
The Pre-Dive Safety Check for Scuba Diving
The scuba diving pre-dive safety (or
What Is a No-Decompression Limit?
A no-decompression limit (NDL) is a time limit for a scuba dive. If a diver exceeds the no-decompression limit for his dive, he can no longer ascend directly to the surface.
How Safe is Scuba Diving and What Are the Risks?
Is scuba diving a safe activity? Read statistics and facts to put the risks of diving in perspective. Scuba diving is not dangerous if simple safety guidelines and procedures are followed.
Submerge Yourself in Basic Scuba Diving...
An overview of scuba diving as a sport and profession. All about the what, who, why, where, and how of scuba.
Can You Dive on Your Period? Menstruation and...
Can you scuba diving on your period? Here considerations for menstruating scuba divers, including the liklihood of shark attacks, the risk of decompression sickness, and the use of tampons.
How Deep Can a Person Scuba Dive?
The deepest dive on open circuit scuba was 1082 feet by Pascal Bernabe, however recreational scuba divers should not exceed 130 feet. Learn about the reasons for recreational scuba diving depth guidelines as well as the training is required to safely exceed them.
Safely Dive With Stingrays
Learn about stingray facts, information, how to scuba dive with them safely, and first aid for stings. Stingrays are not dangerous unless they feel threatened,
How to Clear a Scuba Mask of Water
A scuba diver signals that she is ready to begin the open water mask clearing skill. Mask clearing is an important open water skill.
How to Get Started in Scuba Diving
Are you ready to start scuba diving? Here is a step by step guide to learning to dive, including medical requirements, courses, certification agencies, basic dive theory and frequently asked questions.
What Equipment Do You Need to Scuba Dive?
Learn about the basic equipment required for scuba diving, and what dive gear you should buy first.
How Long Does a Scuba Tank Last?
An average scuba diver on a forty foot dive can stay underwater about 45 minutes. However, the length of time the air in a scuba tank lasts will vary depending upon depth, tank volume, and the diver's air consumption rate.
What to Expect on Your First Scuba Dive
What is scuba diving like? The underwater world looks, feels, and sounds different from the terrestrial one. Here's an article for new divers about what to expect on their first scuba dive.
What Suba Divers Need to Know About Buoyancy
An understanding of buoyancy is key to safe and easy scuba diving. While the concept of buoyancy may be confusing at first, it becomes clearer when we consider how buoyancy effects scuba divers and what divers need to know to properly control their buoyancy on a dive.
7 Tips for Putting on a Wetsuit More Easily
Do you have trouble getting into your tight-fitting wetsuit? Here are seven tricks to putting on a wetsuit more easily.
What Is the Difference Between Steel and...
What is the difference between steel and aluminum scuba tanks? Steel and aluminum scuba tanks differ in their weight, capacity, pressure ratings and buoyancy characteristics. Learn how the differences between steel and aluminum tanks effect scuba divers.
Are You the Right Age and Healthy Enough to...
Can I scuba dive? Learn about the prerequisites for scuba diving such as age, health, and swimming abilities and decide if you are able to scuba dive.
All About Decompression Sickness
An overview of Decompression Sickness, including causes, types, symptoms, risk factors, prevention, and treatment.
Nitrogen Narcosis and Scuba Diving Part I -...
Nitrogen narcosis affects most scuba divers at depths below 100 feet and can be dangerous. Learn about its causes, symptoms, and treatment.
Dangerous Fish and Sea Animals
Which fish and sea animals are dangerous to scuba divers, and which are not? Click through this list of commonly feared sea animals and learn which ones are actually dangerous.
Poor Eyesight and Scuba - Diving With...
Can people with poor eyesight scuba dive? Absolutely! Divers may use prescription masks, soft contact lenses, stick-in bifocals, and even laser eye surgery to ensure clear vision underwater.
Scuba Diving Skills and Techniques
What are some of the basic scuba diving skills and techniques? This review lists some of the typical skills and techniques learned in open water scuba diving certification courses and scuba classes.
How Does a Wetsuit Keep a Scuba Diver Warm...
A wetsuit helps to keep a scuba diver warm underwater by trapping a thin layer of water inside the wetsuit, which his body heats up.
The Most Important Rule in Scuba Diving - Never...
State the most important rule in scuba diving -- open water certification questions. According to PADI, the most important rule of scuba diving is to never hold your breath underwater. Learn 3 reasons for this rule.
Buoyancy in Salt Water vs Fresh Water
Scuba diving concepts: How does an object's buoyancy change from fresh water to salt water? An object is more buoyant in freshwater vs saltwater because . . .
10 Best Scuba Diving Masks
What scuba diving mask should you buy? Here is a list of 10 the 10 best scuba diving masks according to About.com Scuba.
Why Dive With Nitrox?
What are five benefits to scuba diving with nitrox? Why is the use of nitrox in recreational diving becoming more and more popular?
Pulmonary Barotrauma and Scuba Diving
Every scuba diver is at risk of a pulmonary barotrauma if he holds his breath underwater. However, other conditions and actions can cause a pulmonary barotrauma when scuba diving. Learn how to avoid and recognize a pulmonary barotrauma.
Five Point Descent
The five point descent for scuba diving is: signal, orientation, regulator, time and descend. Here is an illustrated guide to the steps of the five point descent for scuba diving.
5 Ways to Keep Your Hair Out of Your Face When...
Long hair can be very annoying when scuba diving. It floats in front of your face and your mask, and shifts around, altering the position of your mask strap. Here are my tips for securing long hair when scuba diving.
How to Try on a Scuba Diving Mask
Different parts of a scuba diving mask with labels.
What Is Open Water?
What does open water mean in scuba diving? In scuba diving, open water is usually defined by parameters such as being less than 130 feet deep and not in an overhead environment. Learn more about open water and other diving terminology here.
Open-Heeled vs Full-Footed Fins
What is the differnce between full-footed and open-heeled scuba diving fins, and which is right for you?
What Is the Maximum Safe Ascent Rate for Scuba...
What is the maximum safe ascent rate for scuba diving? Some diving organizations list the maximum safe ascent rate as 30 feet per a minute, while others list it as 60 feet per a minute. What is the safest ascent rate?
What Is the Definition of a Squeeze in Scuba...
What is the definition of a squeeze in scuba diving? A squeeze can be uncomfortable and even painful. Learn about what causes a squeeze in scuba diving and how to prevent one.
6 Things You Need To Know About Scuba Masks
Scuba masks are one of the most important pieces of scuba diving gear. Here are six important things to know about scuba masks.
6 Steps to a Controlled Descent - Make Descents...
Many divers (even certified scuba divers) find descent the most stressful part of the dive because they have trouble controlling the descent. Learn techniques and hints to have a more enjoyable descent.
Every Dive Is a Decompression Dive
Every scuba dive is a decompression dive because every dive involves the compression and decompression of nitrogen in a diver's body. Shifting the way in which divers commonly view recreational diving may lead to more conservative diving practices and a greater emphasis on following safety guidelines.
Oxygen Toxicity and Scuba Diving
Scuba divers risk oxygen toxicity when they expose themselves to high partial pressures of oxygen. Central Nervous System (CNS) Oxygen Toxicity causes convulsions, unconsciousness and even death in scuba divers. Pulmonary Oxygen Toxicity causes coughing, difficulty breathing and eventual failure of the lungs, and effects mainly technical scuba divers.
Dealing With Ear Pain When Scuba Diving...
What is a reverse block in scuba diving? If a diver experiences increased pressure in his ears during ascent, the worst thing he can do is to continue to go up.
Overcome the Fear of Having Water in Your Scuba...
Are you afraid of getting water in your mask when scuba diving? You are not alone! Here are tips that I use to help my scuba diving students overcome the common fear having water in the mask while diving.
Why Sunblock and Scuba Diving Don't Mix
Scuba divers often slather on sunblock to avoid burning on the way to a dive site. However, there are many reasons why it is a bad idea to wear sunblock underwater when scuba diving.
How Does a Regulator Work? A Beginner’s...
How does a scuba diving regulator work? Learn about regulator first stages and second stages, and how they reduce tank pressure to a pressure breathable by scuba divers. This is the first in an installment of regulator articles for beginners by guest author Matt Dunne.
What Is the Minimum Age for Scuba Diving?
How old do you have to be to scuba dive? Most dive training organizations offer scuba diving lessons for kids starting at the age of eight. Kids older than 10 years old can enroll in a diving certification course.
Open Water Certification
Answers to your basic questions about Open Water Certification.
Air Consumption Rates for Scuba Diving - SAC...
This tutorial leads divers through the basics of air consumption rates for diving. Learn about SAC Rates, RMV Rates, how to calculate them , and use them to plan a dive.
The Sponge Analogy - Understanding Nitrogen...
During a dive, a scuba diver's body absorbs nitrogen. Understand the concept of nitrogen absorption when scuba diving using the sponge analogy.
Divers Can Learn by Observing Animal Behavior...
Learn about the ocean's food chain, or trophic web. Every fish and animal in the ocean plays an intergral role in the health of the entire marine ecosystem.
Is Scuba Diving With Sharks Dangerous?
Is scuba diving with sharks dangerous? No! In fact, a person is more likely to die falling out of his bed or injure himself using the toilet than to be the victim of a shark attack.
Mask Squeeze - Red Eyes and Bruised Cheeks...
To prevent mask squeeze, a scuba diver must equalize the air space inside his scuba mask during descent by exhaling periodically through his nose. Doing so will prevent the mask from suctioning onto his face, which can cause bruising of his cheeks, forehead, and eyeballs.
What is Deep Diving?
Learn all about the thrilling world of deep diving.
Fitness to Scuba Dive
A guide to the basic levels of health and fitness required to scuba dive. Features a check list of common medical problems that may prevent you from being able to scuba dive.
Jellyfish Stings - Facts, Treatments, and...
Jellyfish are more likely to sting swimmers and snorkelers than scuba divers because most species stay relatively close to the surface. However, divers do occasionally experience jellyfish stings. Learn jellyfish facts, symptoms of a sting, and information about first aid treatments/remedies.
Asthma and Scuba Diving
Can asthma sufferers scuba dive? It can be extremely dangerous for some asthmatics to dive. Learn why asthma is sometimes a contraindication for scuba diving.
Decompression Sickness vs Nitrogen Narcosis -...
In scuba diving, nitrogen narcosis and decompression sickness are both caused by nitrogen gas. However, the two conditions have very different symptoms and treatments. Learn the difference between nitrogen narcosis and decompression sickness in scuba diving.
Open Water Skills
A description of each of the water skills taught during the Open Water Diver certification course.
How Do Refresher Courses Benefit Certified...
Refresher courses make scuba diving safer and more enjoyable. Certified scuba divers should enroll in a refresher course to review emergency skills and important dive theory after a period of diving inactivity.
7 Risks and Limitations Associated With Diving...
Scuba diving with enriched air nitrox has limitations and risks. The use of enriched air nitrox increases the risk of oxygen toxicity and explosion. Considerations for scuba diving with enriched air nitrox include depth, cost, availability, complicated dive planning, and the necessity of special gear.
The 5 Basic Parts of a Scuba Regulator
Lean about the different parts of a scuba diving regulator. There are 5 basic scuba diving regulator parts, the first stage, seconds stage, alternate second stage, low pressure inflator hose, and submersible pressure gauge.
Open Water Certification Limits & The Reasons...
Divers who have completed open water certification are limited as to what they may do underwater. For example, they are limited to shallow depths and must stay with a certified buddy. Learn about the reasons behind the open water certification limits for entry level divers, and what risks a diver faces if he exceeds them.
Is Scuba Diving Safe for Kids?
Should kids be allowed to scuba dive, and at what age? Read some of the arguments for and against children diving, and add your own opinion.
Sound Travels About 4 Times Faster in Water...
Does light or sound travel through water faster? Sound travels through water about 4 times faster than in air. Read-in depth answers to this and other PADI Open Water Course Knowledge Review Questions here.
Do You Need to Know How to Swim to Scuba Dive?
Do you need to be able to swim to scuba dive? Scuba experience programs do not require that students know how to swim, but certification courses do.
BCDs For Scuba Diving - Definition, Basics, and...
Here is an easy starting point to learn about BCDs and Scuba Diving, including the three main purposes of BCDs, what kind you should buy, and more.
What Is a Safety Stop?
A safety stop is a three to five minute stop made between fifteen and twenty feet during ascent from a scuba dive. There are a number of reasons to make a safety stop on every dive.
Parts of a Scuba Diving Regulator
Lean about the different parts of a scuba diving regulator. There are 5 basic scuba diving regulator parts, the first stage, seconds stage, alternate second stage, low pressure inflator hose, and submersible pressure gauge.
Scuba Diving Certification Agencies
An overview of popular scuba certification agencies, such as PADI, SSI, BSAC and NAUI. Explanation of what a scuba certification agency is, what is does, and the differences between agencies.
Skin Bends - A Frequently Overlooked Form of...
A frequently overlooked form of decompression sickness in scuba divers, learn how to recognize the common signs and symptoms of skin bends.
Scuba Diving Certification Options - The Open...
The open water referral course allows divers to earn their scuba diving certification in segments. Student divers complete the theory and pool practice with a local dive shop before traveling anywhere in the world to finish their open-water check out dives.
How to Use a Surface Marker Buoy
Surface marker buoy (SMB) use is one of the most under-practiced, important skills a diver can master. It was added to the PADI Open Water Course curriculum in 2015 for good reason: a properly deployed SMB can be a lifesaver.
How to Frog Kick
Learn how to frog kick, a finning technique for scuba diving. Here is a step-by-step illustrated guide to learn how to frog kick properly when diving.
Regulator First Stages: Piston vs Diaphragm -...
What is the difference between a diaphragm and a piston regulator first stage, and which is better? The short answer is that both are very good, but there are some differences to consider when choosing a scuba diving regulator.
Identify Fire Coral
What is fire coral? See a definition and photos of fire coral.
What Is Freediving? Comparison of Freediving vs...
Freediving is an increasingly popular sport in which a diver uses breath holding techniques to maximize his time or swimming distance underwater
Why Does Scuba Diving Make You Need to Pee in...
Scuba divers commonly feel the need to pee in their wetsuits. This is a normal reaction to the underwater environment. Cold water immersion diaresis and the weightlessness of being underwater combine to increase a diver's urine production.
What Does Scuba Stand For (Abbreviations and...
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The Art of Equipment Configuration - 5...
How should you configure your scuba diving gear for optimal comfort and functionality? Learn 5 basic rules of scuba diving equipment configuration for all divers, regardless of their type of diving or scuba system.
Archimedes Principle - Essential Concepts for...
Archimedes' Principle states that an object's buoyancy is equal to the weight of the water that it displaces. Why is Archimede's Principle important for scuba diving?
Scuba Fins Styles and Features
Photos and explanation of the features an styles of scuba diving fins. Learn about scuba fins before deciding on a purchase.
PADI's Order of Priority for Low-on-Air/ Out of...
Explanation of the PADI knowledge review question
Make Your Own "Save a Dive" Kit
Nearly every time I meet divers at a dive site, I receive a few strange looks as I unload my truck. I
Decongestants and Scuba Diving
Can you scuba dive with decongestants? It may be safe to scuba dive with decongestants, but there are several points a diver should take under consideration before deciding whether or not to use medication underwater.
BCDs: Vest-Style Versus Back Inflation
What is the difference between a vest-style and a back inflation BCD?
First Stage
See a diagram of the basic parts of a scuba diving regulator first stage. Learn about the different parts of s scuba diving regulator. Page 2.
BARE Velocity Wetsuit Review
Read a review of BARE Wetsuits. Learn about fit, durability and features of the BARE Velocity wetsuit.
4 Types of Freediving Training That You Can Do...
Freedivers can train to improve performance without ever getting wet. Learn to use the carbon dioxide tables, oxygen tables, and apnea walk for freediving training.
The Mammalian Diving Reflex and Freediving...
The mammalian diving reflex is a natural adpative reflex which allows marine mammals, diving birds, and people to stay underwater for long periods of time.
Balanced vs Unbalanced - Regulator Basics for...
Is balanced scuba diving regulator better than an unbalanced regulator? Will it perform better at depth? Learn about the basics of balanced vs unbalanced regulators.
7 Types of Freediving Equipment (Gear)
Learn about 7 tyoes of freediving equipment. Freediving gear includes masks, snorkels, fins, wetsuits, and as surface support station. Learn about freediving gear, and what makes it different from scuba diving gear.
Maximum Operating Depth (MOD) and Scuba Diving
A Maximum Operating Depth (MOD) is a depth limit based on the concentration of oxygen in a scuba diver's tank. Learn about the situations in which a scuba diver must calculate a maximum operating depth and see the MOD formula.
Residual Nitrogen Time (RNT) and Scuba Diving
What is residual nitrogen time in scuba diving? This explanation will help divers to understand what residual nitrogen time represents and how to use this number in recreational diving when calculating repetitive dive parameters.
Fish Identification Guide - 20 Species of Puget...
Pacific fish identification guide to the Puget Sound, Seattle, and Washington. Learn trivia and see photos of 20 common fish and animal species along the Northwest of the United States.
What Are the Emergency Decompression Guidelines...
What are the emergency decompression rules for scuba diving? Guidelines for emergency decompression state that a scuba diver should remain at fifteen feet for either eight or fifteen minutes, depending upon how long he exceed his no-decompression limit.
How to Preform the Controlled Emergency...
The controlled emergency swimming ascent allows a scuba diver to safely surface in an out-of-air emergency without the help of his buddy. Scuba divers learn the controlled emergency swimming ascent during their open water certification course.
Dive Theory
Review basic concepts essential to safe and easy scuba diving. Here is a list of important dive theory that all scuba divers need to know.
Nitrogen Narcosis and Scuba Diving Part II -...
A diver who experiences nitrogen narcosis should ascend until the narcosis subsides. Learn tricks to avoid and reduce nitrogen narcosis here.
Open Water Skill: Proper Weighting
How to perform the Open Water skill 'Proper Weighting'
Alternobaric Vertigo and Scuba Diving
Alternobaric vertigo is a common type of vertigo experienced when scuba diving. Thankfully, it lasts a short period of time and resolves on its own. Here are tips for dealing with alternobaric vertigo and dizziness underwater.
Snorkels With Purge Valves
Learn about snorkels with purge valves. See photos of snorkels and learn about snorkel features and styles. Snorkels are an important pieces of scuba diving gear. Here are photos and information to help find a snorkel that is appropriate for your needs. Page 6.
Can You Vomit Underwater While Scuba Diving?
Can you vomit or throw up underwater. If you get seasick on boats, you maybe worried about getting seasick underwater. While becoming seasick underwater is highly unlikely, here is information that scuba divers should know about vomiting underwater.
Why Does Spit Keep a Scuba Mask From Fogging?
Why does spit keep a mask from fogging? Spit keeps a scuba diving mask from fogging because it acts as a surfactant . . .
Stinging Hydroids - Facts and Sting Treatment
Stinging hydroids are members of the Hydrozoa class, which includes the portuguese man of war and fire coral.
Factors That Affect Visibility Underwater When...
What are factors that effect the visibility underwater when scuba diving? The PADI knowledge review lists several factors that influence the clarity of water, learn about these and other factors such as salinity.
What Is the Best Way to Prevent Water From...
What is the best way to prevent water from entering your scuba cylinder? Always keep a little gas in the tank -- but there is one more way for moisture to get in . . .
How Bad Is a Bearded Fireworm Sting?
A bearded fireworm sting really hurts. Fireworms are found in tropical atlantic waters. Stings are treated by removing the spine and treating the affected area.
What Does the Term "Partial Pressure" or "PP"...
What is the partial pressure of a gas in scuba diving, and how can you calculate it? This is important in diving as the effects of the many gasses change with an increase in partial pressure.
Trim Part I: What Is Proper Trim and Why Will...
Trim refers to a scuba diver's body position. Proper trim is a completely horizontal position, with arms extended and fins elevated. Learn about the value of proper trim, why it is important to both recreational and technical scuba divers.
Where Should a Scuba Diver Attach His Alternate...
Where should a diver attach his alternate air source regulator? When scuba diving, it is important that the alternate air source regulator be attached in an easily visible location where it may be accessed quickly and efficiently.
Trim Part II: Five Ways to Position Your Body...
Proper trim is one of the most important scuba diving skills, but also one of the most overlooked. Here are 5 adjustments a diver can make to his body position to achieve proper horizontal trim in scuba diving.
Balanced vs Unbalanced, Piston vs Diaphragm -...
Which is better? An unbalanced or a balanced scuba diving regulator? A piston style first stage or a diaphragm style first stage? The truth is that while all styles have some advantages and disadvantages, they will all work well and safely for recreational scuba diving.
Surface Intervals (SI) and Scuba Diving
What is a surface interval (SI) in scuba diving? A surface interval is the time a diver spends above water in between two dives. To stay safe and comfortable, a diver should
3 Pieces of Gear Every Diver (and Student...
There are three pieces of scuba gear that every scuba student and certified scuba diver should own. Learn about the basic styles and features of the three most important pieces of scuba gear.
Creative Uses for Old Scuba Tanks
What can you do with a decommissioned scuba diving tank? Once a tank fails hydro, what can you do with it? Read tips from other divers and share your own.
Carbon Dioxide and Scuba Diving
High levels of carbon dioxide (hypercapnia) can cause a variety of dangerous symptoms in scuba divers, such as narcosis and unconsciousness. However, high carbon dioxide levels are avoidable if a scuba diver follows safe diving practices and avoids behavior that may predispose him to hypercapnia.
Can You Scuba Dive With Breast Implants?
Can you scuba dive with breast implants? Yes, after an appropriate recovery time, scuba diving after a breast augmentation surgery is safe. How do breast implants affect buoyancy? Do breast implants compress underwater?
Tipping Guidelines for Scuba Divers
Tipping is so confusing. Who should divers tip after dive, and how much is appropriate? Here are some tipping guidelines for scuba divers.
Learn to Dive Online
How can you learn to scuba dive online? Online scuba diving certification courses allow student divers to save time by completing the theory portion of scuba diving courses online.
8 Regulator Mouthpieces
Scuba diving mouthpieces come in a variety of styles. See an illustrated list of common types of scuba diving regulator mouthpieces.
7 Types of Freediving
The different types of freediving (apnea) include static, dynamic, constant weight with fins, constant weight without fins, variable weight, and no limits. Learn about the these freediving disciplines and compare and constrast the differences between them.
Semi-Closed vs Closed-Circuit Rebreathers
What is the difference between Semi-Closed Rebreathers (SCR) and Closed Circuit Rebreathers (CCR)? Learn about the advantages of each.
Moray Eels - Facts and Information for Scuba...
Is scuba diving with moray eels dangerous? No! Moray eels are fascninating and harmless to scuba divers unless threatened. Learn about moray eel facts and information here.
10 Things Scuba Divers Should Know About Sea...
What type of sea turtle did you just see on your dive? Was it an endangered species? Learn about the different species of sea turtles and more.
Open Water Swimming Tests
I frequently get questions on the difficulty of the water skills tests. The good news is that they're not difficult at all, and I've written some tips below to make them even easier.
Patent Foramen Ovale and Diving
What is a Patent Foramen Ovale (PFO) and why might it increase a diver's chance of decompression illness or DCI? A patent foramen ovale as a hole in a diver's heart that has not properly closed during development. Up to a third of divers have this condition, which may increase the risk of decompression illness.
What Is Oxygen Toxicity in Scuba Diving?
Oxygen toxicity is a danger to scuba divers who dive beyond the recreational limits, use nitrox, or use 100% oxygen as a decompression gas.
World Records of Freediving (Apnea) as of Jan...
The freediving (apnea) world records as of the beginning of 2013 are pretty incredible. Here is a list of freediving records in static freediving, dynamic freediving, constant weight freediving, variable weight freediving, and no-limits freediving.
How to Wash Your Scuba Gear
One of the most important skills you'll learn as a diver is how to properly wash your scuba equipment. It's very important to wash your scuba equipment thoroughly after every day of diving. Washing your scuba gear ensures that it all performs safely as it was intended to and it will also prolong its life.
Open Water Certification Course Options
Several different formats of the Open Water Scuba Diver Course exist. Students considering enrolling in a scuba certification course should consider the different course options such as a referral courses and online learning options.
Pressure Groups and Scuba Diving
What is a pressure group in scuba diving? A pressure group is an alphabetical representation of the amount of nitrogen a diver has absorbed after diving or after a surface interval. For safe diving, a diver should
Salt Water Aspiration - A Lesser Known Scuba...
Salt water aspiration syndrome can during or after diving when a scuba diver inhales salt water. Symptoms include difficulty breathing and chest pain.
Dive Flags
Scuba divers should always fly a dive flag at dive sites where boat traffic is a possibility. Learn about the different types of dive flags and when to use them.
Adjusting Trim Using Equipment Choice and...
Adjust and select scuba diving gear to achieve proper trim (horizontal position in the water) using these seven tips. A diver's trim is affected by his weight distribution, wetsuit, fins, regulators, tank position and more.
The Fin Pivot - Swim Like a Fish Using the Fin...
The Fin Pivot is a skill learned in most scuba certification courses. Learn about the Fin Pivot and other scuba diving skills and scuba certification courses.
Scuba Tip: Always Purge Your Regulator After...
One of the best tips I was ever given as a new scuba diver was to always purge your regulator after closing your tank valve. This avoids a potentially deadly situation.
Primary Second Stage
Learn about the different parts of a scuba diving regulator second stage. See photos and read a description of the parts of a seconds stage scuba regulator. . Page 3.
Open Water Skill: Mask Removal and Replacement
How to perform the Open Water skill 'Mask Removal and Replacement'
Regulator Recovery Can Save Your Life
Photos and explanation of the regulator recovery skill. Regulator recovery is taught in most scuba certification courses and could someday save your life.
Scuba Tip: Preventing Blisters on Your Feet and...
Sometimes dive booties and fins can rub raws spots or blisters on a scuba diver's feet and ankles. Here is one tip for preventing blisters when scuba diving.
How to Deal With Hyperventilation When Scuba...
What should you do if you hyperventilate when scuba diving. Here is advice on how to deal with shortness of breath caused by hyperventilation or exertion underwater.

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