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Scuba Diving: Most Popular Articles

These articles are the most popular over the last month.
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.
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 Divers Should Equalize Ear Pressure
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.
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.
Types of Rays - Stingrays, Manta Rays, Electric...
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.
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.
Under Pressure
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.
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.
What Does SCUBA Stand For?
: What Does SCUBA Stand For? The term "scuba" was originally a capitalized acronym: SCUBA. These days,
What Is the Difference Between DIN and Yoke...
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.
Is Scuba Diving Safe or Dangerous?
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.
About.com Scuba's 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.
All About Decompression Sickness
An overview of Decompression Sickness, including causes, types, symptoms, risk factors, prevention, and treatment.
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.
Buoyancy Basics for Scuba Diving
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.
Can I Scuba Dive? Prerequisites for Scuba...
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.
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.
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.
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.
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.
PADI's Order of Priority for Low-on-Air/ Out of...
During the PADI Open Water Course , one question causes student divers to tear their hair out in confusion.
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.
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.
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 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.
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?
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.
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.
Start 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.
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 . . .
Open Water Certification
Answers to your basic questions about Open Water Certification.
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.
About Scuba Diving
An overview of scuba diving as a sport and profession. All about the what, who, why, where, and how of scuba.
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.
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.
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.
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.
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.
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.
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.
The Pre-Dive Safety Check for Scuba Diving
Do you consider flying dangerous? Most people will agree that while there are certain risks associated
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?
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.
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 is Deep Diving?
Learn all about the thrilling world of deep diving.
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.
What is Partial Pressure and Why Is It...
What is partial pressure and what does it have to do with scuba diving? Partial pressure is a way that divers measure the concentration of a gas. Knowing the partial pressure of a gas is important because the physiological and psychological effects of the many gasses change with an increase in partial pressure.
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.
Dive Trip Report: San Pedro on the Island of...
Review of scuba diving the local reefs of the coast of San Pedro, Belize. Ambergris Caye is a Caribbean island off the coast of Belize.
Nitrogen Narcosis and Scuba Diving Part I -...
Nitrogen narcosis affects most scuba divers at depths below 100 feet. Also known as inert gas narcosis, rapture of the deep, and the martini effect, nitrogen narcosis can be dangerous to divers. Learn about the causes, symptoms, and treatment for nitrogen narcosis here.
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.
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.
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.
Reverse Block and 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.
Dry Top Snorkels
Learn about dry top snorkels. 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 4.
How to Try on a Scuba Diving Mask
Different parts of a scuba diving mask with labels.
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.
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.
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.
Open Water Skills
A description of each of the water skills taught during the Open Water Diver certification course.
Skin Bends - A Frequently Overlooked Form of...
Skin bends, or cutaneous decompression sickness, is a frequently overlooked form of decompression sickness in scuba divers. Divers should be able to recognize the common sings and symptoms of skin bends as they may require treatment and can precede other, more serious types of decompression sickness.
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?
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.
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?
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.
5 Courses to Advance Your Scuba Diving...
Take the next step in scuba diving! Learn about how to advance your scuba diving certification with courses from 5 of the most popular scuba diving organizations. Learn what the required prerequisites and age limits for different scuba diving certification agencies.
Discover Scuba Diving
An overview of the PADI Discover Scuba Diving program. A program that allows you to try diving under close supervision of a professional dive instructor.
What Is a Safety Stop?
In scuba diving, a safety stop is a three to five minute stop made between fifteen and twenty feet during ascent. Recreational scuba divers should make a safety stop at the end of every dive.
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.
Light and Compact BCDs Developed For Travelers
Lightweight and Compact travel buoyancy compensators (BCDs) are making dive travel easier. Three great travel BCDs are the Aqualung Zuma, the Cressi Travel Light, and the Seacsub Airone are now on the market.
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. Page 2.
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.
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.
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.
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.
The Great Pacific Garbage Patch
The Great Pacific Garbage Patch is located in the middle of the North Pacific Ocean. Click through a short lesson and photos of this island of trash, and learn what you can do to help.
BCDs: Vest-Style Versus Back Inflation
What is the difference between a vest-style and a back inflation BCD?
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.
What's the Difference Between These Masks?
This guide to how to choose a scuba diving mask will familiarize you with the common mask styles and features. Never purchase a mask before learning about the different types available. There are such a variety of high quality masks available that there is sure to be one that is right for you!
Freediving
Freediving is a sport in which a diver descends in the water using a single lungful of air. Learn about the basics of free diving, as well has how it differs from 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.
Photos of Scuba Diving in Xcalak - A Hidden...
Scuba divers at La Posa dive site in Xcalak have the opportunity to swim through huge schools of tarpon fish. The dive sites in Xcalak are still teaming with aquatic life due to Xcalak's status as a protected marine sanctuary. Page 3.
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.
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.
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.
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.
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.
Why Is Underwater Vision Blurry without a Mask...
Human eyes are made to see in air, not in water. A person who opens his eyes underwater has blurry vision due to the different refractive properties of water. A scuba mask or pair of goggles holds air against a person's face, allowing him to focus his eyes as he would on land -- just remember to use a mask (not goggles) when scuba diving.
Snorkels Without Purge Valves
Learn about snorkels without 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 5.
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.
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.
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.
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.
Xcalak, Mexico - Shipwrecks, Manatees, and More
Xcalak, Mexico is a diving marine park located on the southeastern edge of the Yucatan Peninsula. A short boat ride to shipwrecks at Banco Chinchorro and pristine coral reefs make Xcalak a prime scuba diving destination and one of Mexico's best kept secrets.
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.
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.
10 Hints For Perfect Buoyancy Control
Hints and tips to improve your buoyancy control. Good buoyancy control is one of the most difficult skills to master in scuba diving, but also one of the most important. Here is a list of ways to improve your buoyancy.
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.
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.
BCDs For Scuba Diving - Definition, Basics, and...
Here is an easy starting point to learn about BCDs and Scuba Diving. This page discusses: • What Does
8 Regulator Mouthpieces
Scuba diving mouthpieces come in a variety of styles. See an illustrated list of common types of scuba diving regulator mouthpieces.
You Know You're Addicted to Diving When . . .
How you know that you are addicted to scuba diving. Read various readers answers of how they knew they were dive obsessed scuba addicts.
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.
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.
What is Oxygen Toxicity?
Oxygen toxicity is a medical condition caused by exposure to oxygen at high pressures. Oxygen toxicity may be experienced by scuba divers who dive beyond recreational dive limits, used mixed gasses such as enriched air nitrox, and decompress using oxygen. These divers must take precautions to avoid oxygen toxicity.
Freediving Physiology Basics
How does a freediver hold his breath for so long underwater? Learn about the basic physiology of freediving, including the roles of carbon dioxide and oxygen in increasing breath hold time.
Open Water Skill: Free Flowing Regulator
How to perform the Open Water skill 'Free Flowing Regulator'
Identify Fire Coral
What is fire coral? See a definition and photos of fire coral.
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.
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.
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.
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.
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
Mask Attachments
Learn how to attach a snorkel to a mask. 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 10.
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.
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.
Blade Fins
Images of Blade Scuba Fins. Photos and explanation of the features an styles of scuba diving fins. Learn about scuba fins before deciding on a purchase. Page 5.
Snorkeling Basics and Information for Novices
What is snorkeling? Learn basic information for novice snorkelers, including snorkeling prerequistes, who can snorkel, and where you can snorkel.
Split Fins
Images of Split Fins. Photos and explanation of the features an styles of scuba diving fins. Learn about scuba fins before deciding on a purchase. Page 6.
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.
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.
Side Mount Scuba Diving
Side Mount scuba diving is an increasingly popular way for divers to enjoy the underwater world. Learn basic facts and information about side mount equipment configurations for diving and side mount scuba systems.
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.
Masks With Optical Lenses
Scuba diving masks can be created for use with corrective lenses. Learn about scuba diving mask styles and features. Page 8.
Rigid Snorkels
Learn about rigid snorkels. 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 7.
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.
Buoyancy Compensator (BCD) Styles and Features
Learn about the different styles and features of buoyancy compensators or BCDs. Scuba divers purchasing a buoyancy compensators should understand the different styles and features of buoyancy compensators before buying one.
What is Enriched Air Nitrox?
What is enriched air nitrox? Enriched air nitrox is a mixture of oxygen and nitrogen that has an oxygen percentage greater that 21%. Enriched air nitrox is used by scuba divers in recreational and technical diving.
Flexible VS Stiff Fins
Photos and explanation of the features an styles of scuba diving fins. Learn about scuba fins before deciding on a purchase.
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.
6 Tips for Transitioning to Cold Water Diving
Cold water diving is as comfortable and enjoyable as warm water diving when the correct equipment and procedures are used. Here are 6 tips to help scuba divers transition to cold water diving.
BARE Velocity Wetsuit Review
Read a review of BARE Wetsuits. Learn about fit, durability and features of the BARE Velocity wetsuit.
Flexible Snorkels
Learn about flexible snorkels. 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 8.
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
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.
Open Water Skill: Proper Weighting
How to perform the Open Water skill 'Proper Weighting'
Turtle Fins
Images of turtle fins. Photos and explanation of the features an styles of scuba diving fins. Learn about scuba fins before deciding on a purchase. Page 8.
Scuba Diving Lessons for Kids
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 Skill: Mask Removal and Replacement
How to perform the Open Water skill 'Mask Removal and Replacement'
Innovative Fins
Innovative scuba fins. Photos and explanation of the features an styles of scuba diving fins. Learn about scuba fins before deciding on a purchase. Page 11.
Scuba Fins With Closed Heels
Images of scuba fins with closed heels. Photos and explanation of the features an styles of scuba diving fins. Learn about scuba fins before deciding on a purchase. Page 2.
Scuba Fins With Open Heels
Photos and explanation of the features an styles of scuba diving fins. Learn about scuba fins before deciding on a purchase. Page 3.
Snorkeling Fins
Images of snorkeling fins. Photos and explanation of the features an styles of scuba diving fins. Learn about scuba fins before deciding on a purchase. Page 7.
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 . . .
How to Clean Dive Slates and Underwater Notebooks
Slates and underwater notebooks are useful writing utensils for scuba diving, but how can you get them clean after use? Don't use soap or pencil erasers! Instead try this tip!
Salt Water Aspiration and Scuba Diving
Salt water aspiration syndrome is a rare condition occasionally observed in scuba divers who inhale a small amount of salt water. Most cases are preventable with proper gear maintenance and good diving protocols.
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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