Scuba Diving Sitemap - Page 2 2016-09-26

Pacific Fish Identification Guide - Puget Sound Washington Northwest United States
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.

Pacific Fish Identification Guide - Puget Sound Washington Northwest United States
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.

Pacific Fish Identification Guide - Puget Sound Washington Northwest United States
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.

Pacific Fish Identification Guide - Puget Sound Washington Northwest United States
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.

Pacific Fish Identification Guide - Puget Sound Washington Northwest United States
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.

Pacific Fish Identification Guide - Puget Sound Washington Northwest United States
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.

Pacific Fish Identification Guide - Puget Sound Washington Northwest United States
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.

Pacific Fish Identification Guide - Puget Sound Washington Northwest United States
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.

Pacific Fish Identification Guide - Puget Sound Washington Northwest United States
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.

Pacific Fish Identification Guide - Puget Sound Washington Northwest United States
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.

Pacific Fish Identification Guide - Puget Sound Washington Northwest United States
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.

Pacific Fish Identification Guide - Puget Sound Washington Northwest United States
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.

Dangerous Fish and Sea Animals for Scuba Diving
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.

Dangerous Fish and Sea Animals for Scuba Diving
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.

Dangerous Fish and Sea Animals for Scuba Diving
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.

Dangerous Fish and Sea Animals for Scuba Diving
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.

Dangerous Fish and Sea Animals for Scuba Diving
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.

Dangerous Fish and Sea Animals for Scuba Diving
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.

Dangerous Fish and Sea Animals that Divers Commonly Fear
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.

Dangerous Fish and Sea Animals for Scuba Diving
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.

Dangerous Fish and Sea Animals for Scuba Diving
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.

Dangerous Fish and Sea Animals for Scuba Diving
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.

Dangerous Fish and Sea Animals for Scuba Diving
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.

Dangerous Fish and Sea Animals for Scuba Diving
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.

Dangerous Fish and Sea Animals for Scuba Diving
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.

Dangerous Fish and Sea Animals for Scuba Diving
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.

Why You Should Train in Shallow Water
Diving in pools or very shallow dive site for practice may seem boring or even be frustrating, but if you can control yourself in shallow water, you will be better in any diving environment.

Equalization for Scuba Divers
The need to equalize your ears when diving can be a helpful clue that other air spaces should also be equalized. Here's a list of items to check everytime you equalize your ears.

Ear Beer for Scuba Divers
Divers can use ear beer to reduce the risk of ear infections after any dive. Ear beer helps to prevent infections in two ways.

Dealing With Ear Pain When Scuba Diving (Reverse Block)
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.

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.

Mola Mola aka Giant Floating Heads
Mola mola, or the ocean sunfish, look like giant floating heads. They are relatively harmless to divers and are unusual (but awesome) to see on a dive.

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?

Boating Safety
Everything you need to know to safely enjoy boating and diving from a boat.

The Caribbean Cup 2015 - Freediving Competitions
The Caribbean Cup is an international freediving competition held each year in Roatan, Honduras. Here's a report form Julien Borde, a judge at the competition.

What Equipment Do You Need to Scuba Dive? (Gear Basics)
Learn about the basic equipment required for scuba diving, and what dive gear you should buy first.

7 Pieces of Equipment Every Solo Diver Should Have
Having the correct equipment and being able to use it with ease is a necessary component of safe and competent solo diving.

Julien Borde - Freediving and Apnea Instructor
Guest author and freediving (apnea) expert Julien Borde's bio page for About.Com Scuba.

Torben Lonnes Top 10 Wreck Dives
Where should you go on your next wreck diving trip? Guest author Torben Lonne of Dive.in magazine shares his top 10 wreck diving sites.

Effective Actions Underwater: Mastering the Command Chain
Divers who use the command chain will become more confident and controlled. They are able to manage complex tasks, and generally proceed much more quickly through training.

What Every Cave Diver Should Know About Restrictions
The line continues . . . should you? Following a cave line through a tight passageway can be a whole lot of fun, but without proper training, restrictions can be dangerous. This article contains advice for managing restrictions effectively, as well as a quick overview of the different types of restrictions and the hazards involved with them.

What Is Technical Diving? Facts About Tec Diving for Beginners
Technical diving (tec diving) is a type of scuba diving that enables divers to exceed recreational diving limits of time, depth, and penetation.

Tips for Beginning Independent Cave Diving After Certification
Beginning to cave diving without an instructor will help you to become fully aware of the cave environment and increase your confidence, even when choosing to use a guide in new areas.

7 Characteristics That Make a Good Technical Diver
What makes a great technical diver? Here are 7 characteristics that cave and technical diving instructor Vincent Rouquette-Cathala believes all good technical divers possess. How many apply to you?

4 Reasons That Damselfish Are More Interesting Than You Think
Damselfish behavior can be very interesting to divers. What behaviors should you look for the next time you see one of these fiesty fish on a dive?

Scuba Divers With Disabilities Try Diving for the First Time
People with disabilities try scuba diving for the first time at the No Barriers Summit in in Park City Utah, and they love it!

How Solo Dive Training Makes You a Better Diver
Divers who complete solo training will be better divers, regardless of whether they are diving alone or in a buddy pair.

What Is Commerical Diving?
A commercial dive is not about the time, the depth, the experience, or the adventure; it is about the money. Learn about commerical diving from a pro.

Why Marine Protected Areas Matter to Divers
Marine Protected Areas (MPAs) serve as valuable sources of coral and fish that can repopulate our depleted oceans, and MPAs can also make fantastic dive sites for responsible. divers!

How Freediver Jessea Lu Set 5 National Records in Her First Competition
Freediver Jessea Lu went from novice to Chinese national record holder in just under one year. Learn about her recent competition and read her tips in this interview.

Open Water Skill: Disconnect Low Pressure Inflator
How to perform the Open Water skill 'Disconnect Low Pressure Inflator'

Open Water Skill: Disconnect Low Pressure Inflator
How to perform the Open Water skill 'Disconnect Low Pressure Inflator'

Open Water Skill: Disconnect Low Pressure Inflator
How to perform the Open Water skill 'Disconnect Low Pressure Inflator'

Open Water Skill: Disconnect Low Pressure Inflator
How to perform the Open Water skill 'Disconnect Low Pressure Inflator'

Open Water Skill: Disconnect Low Pressure Inflator
How to perform the Open Water skill 'Disconnect Low Pressure Inflator'

Why Is Wreck Diving Dangerous?
Wreck diving is a lot of fun, but it can also be very dangerous. Learn about the hazards of wreck diving and why special training is required.

Why Solo Diving Is Great for Underwater Photography
Underwater photographers and videographers often dive solo - even if they don't realize it. When properly trained, there are benefits of solo diving for underwater photographers.

4 Digital Products PADI Instructors Can Start Using Today
PADI's suite of digital products including the PADI App, eLearning, Touch Products, and Digital Certification Paks make learning to dive more convenient for many dive students.

Scubility: SDI's Adaptive Diving Program
The SDI Scubility Dive programs offers divers with disabilities the opportunity to participate in open water scuba diving as independently as possible.

What Is Decompression In Scuba Diving?
What is decompression and why do certain scuba dives require decompression stops while others do not?

5 Myths About Solo Diving
If you have heard only negative comments about solo diving, it's time to debunk some myths! Here are five common misconceptions about solo diving.

8 Things to Do Beforehand to Make Your Next Dive Trip a Success
Doing your research, testing your dive gear, and packing carefully can make the difference between a perfect scuba trip and a frustrating one. Here are some suggestions for dive travelers.

Christine Kathleen McMahon - Guest Author for Diving With Disabilities
Christine Kathleen McMahon is a guest author for About.com Scuba, writing about scuba diving for people with disabilities.

Scuba Schools International (SSI) Classified Diving
SSI's Classified Diver program is directly regulated by Scuba Schools International. The certification is offered through the same agency as their able-bodied counterparts.

10 Things Every PADI Pro Should Know About the New ReActivate Program
The PADI ReActivate Program is replacing the Scuba Review Program. All instructors teaching in English are required to implement the program by October, 2015.

PADI’s Revised Open Water Course
PADI's Revised Open Water Course incorporates electronic media and new skills with the aim of created more confident and competent divers.

Getting Started Solo Diving
How does a diver become solo certified, what agencies offer solo diver certification, and what should a diver consider before enrolling in a solo diving course?

Bleached Out - A Diver's Guide to Coral Bleaching
When coral is stressed, it expels its symbiotic algae and loses its color. This is known as coral bleaching, and 2015 is set to have the worst bleaching event in recent history.

Are You Ready for Underwater Photography?
Are you ready to become an underwater photographer? Learn about what it takes to photograph while scuba diving, and read tips to improve your photos.

Benefits and Hazards of Using Different Gas Blends in Tec Diving
Technical divers use a variety of gas blends to reduce decompression times, maintain safe levels of oxygen, and keep a clear head. Learn about risks of benefits of using several gas blends on a single dive.

Hypoxic Trimix Diving
Technical divers use hypoxic trimix at depths below 180 ft/ 55 m to reduce the risk of oxygen toxicty, minimize narcosis, and reduce the work of breathing.

Scuba Diving Stock Photography Fails
Scuba diving stock photography fails. Join me on a humorous, sometimes aggravating journey through the dark recesses of scuba diving stock photography.

Properly Weighting Yourself for Scuba Diving
Properly weighting yourself for scuba diving is key to safe and comfortable dives. Need some help? Here are 6 tips to for proper weighting.

Freediving With Sailfish in Mexico
Freediving with sailfish is an exhilarating experience. Freedivers can encounter sailfish off Mexico's Yucatan Peninsula from January to March.

4 Facts About Coral Reefs Divers Might Not Know
Did you know that coral reefs are interconnected structures that can share nutrients? They even have a simplistic neural network! Here are 4 facts about coral for scuba divers.

Dive Pirates
Dive Pirates is a nationwide nonprofit foundation dedicated to opening the mainstream scuba world up to divers with disabilities.

Dive Site Preservation - Conservation Tips for Scuba Divers
The Earth's oceans are in danger. Here are tips to help scuba divers preserve their favorite dive sites.

Dive Site Preservation - Conservation Tips for Scuba Divers
The Earth's oceans are in danger. Here are tips to help scuba divers preserve their favorite dive sites.

Dive Site Preservation - Conservation Tips for Scuba Divers
The Earth's oceans are in danger. Here are tips to help scuba divers preserve their favorite dive sites.

Dive Site Preservation - Conservation Tips for Scuba Divers
The Earth's oceans are in danger. Here are tips to help scuba divers preserve their favorite dive sites.

Dive Site Preservation - Conservation Tips for Scuba Divers
The Earth's oceans are in danger. Here are tips to help scuba divers preserve their favorite dive sites.

Dive Site Preservation - Conservation Tips for Scuba Divers
The Earth's oceans are in danger. Here are tips to help scuba divers preserve their favorite dive sites.

Dive Site Preservation - Conservation Tips for Scuba Divers
The Earth's oceans are in danger. Here are tips to help scuba divers preserve their favorite dive sites.

Dive Site Preservation - Conservation Tips for Scuba Divers
The Earth's oceans are in danger. Here are tips to help scuba divers preserve their favorite dive sites.

Dive Site Preservation - Conservation Tips for Scuba Divers
The Earth's oceans are in danger. Here are tips to help scuba divers preserve their favorite dive sites.

Dive Site Preservation - Conservation Tips for Scuba Divers
The Earth's oceans are in danger. Here are tips to help scuba divers preserve their favorite dive sites.

8 Project AWARE Specialties for PADI Instructors
The Project AWARE Program offers scuba instructors a wide range of specialty courses that can be used to educate students about the plight of our oceans.

Shell Shocked: A Diver’s Guide to Ocean Acidification
Ocean acidification is the result of the oceans absorbing carbon dioxide from the atmosphere. This has disasterous effects on our favorite dive sites.

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.

Rebreather Diving Basics - What Are Rebreathers and How Do They Work?
The advantages of rebreather diving include extended dive times and no-decompression limits. How do rebreathers work? Should you consider rebreather training?

Kris Harrison - Guest Author for About.com Scuba
Kris Harrison is a guest author for About.com Scuba and the owner of Sirius Diving. He trains students and instructors in technical, cave, and rebreather diving.

Scuba Diving Record Depths and Guidelines
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.

What Is Freediving? Comparison of Freediving vs Scuba
Freediving is an increasingly popular sport in which a diver uses breath holding techniques to maximize his time or swimming distance underwater

3 Types of Cross-Training for Every Freediver
Cross training activities for freediving can help a freediver maintain his abilities when he is away from the water, so that he is prepared and in shape for his next freediving trip.

What Makes an Adaptive Dive Instructor Special?
Adaptive scuba diving instructors are specially trained to teach students with physical and psychological disabilities to dive safely.

The Difference Between Steel and Aluminum Scuba Tanks
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.

Scuba Diving Certification Agencies Compared
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.

World Record Freediving
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.

Are Stingrays Dangerous? How to Avoid Stings
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,

Open Water Certification - Your Questions Answered
Answers to your basic questions about Open Water Certification.

PADI's 4 Emergency Ascent Procedures in Priority Order
Explanation of the PADI knowledge review question

Asthma and Diving - Can Asthmatics Scuba Dive?
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.

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.

Dangers of Scuba Diving With Sharks
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.

Scuba Diving Safety Statistics, Risks and Dangers
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.

Scuba Diving Health and Fitness Assessment
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.

Decompression Sickness - Causes, Types, and Symptoms
An overview of Decompression Sickness, including causes, types, symptoms, risk factors, prevention, and treatment.

Decompression Sickness: Risk Factors, Prevention & More
An overview of Decompression Sickness, including causes, types, symptoms, risk factors, prevention, and treatment. Page 2.

The Ocean Food Chain - The Marine Trophic Web
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.

About Deep Diving, Including Concerns and Courses
Learn all about the thrilling world of deep diving.

Skin Bends Information for Scuba Divers
A frequently overlooked form of decompression sickness in scuba divers, learn how to recognize the common signs and symptoms of skin bends.

Overcome the Fear of Water in Your Mask - Scuba Diving
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.

How to Make a Controlled Descent for Scuba Diving
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.

Rebreather Diving - What Is a Breathing Loop?
What is the breathing loop in rebreather diving? The loop is composed all all the parts of the rebreather that a divers breath gas cycles though.

Red Eyes and a Bruised Face After Scuba Diving
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.

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.

5 Ways Divers Can Support Coral Conservation Underwater
Scuba divers can have a negative impact on the underwater world they love, or they can have a positive one. Learn five ways that you can help to protect coral reefs while scuba diving.

Store Your Scuba Gear for Winter
As the weather turns chilly, many divers pack away their scuba gear for the winter (or at least until the winter holidays). Dive equipment storage is an art in

Is There a Maximum Descent Rate?
Descent Rates and Scuba Diving - What is the Maximum Safe Descent Rate for Scuba Diving?

Improve Your Breathing Technique
Advise on how to improve your air consumption rate when scuba diving

Why Does Spit Prevent a Scuba Diving Mask From Fogging?
Before diving, people apply spit or commercial defog solution to the inside of their masks to keep them from fogging. But why does it work? A client asked me

Scuba Diving in the Rain
Every time dark rain clouds roll in (which happens frequently in a tropical environment) the new divers on the boat look at me and shudder,

My First Rebreather Experience
Last week I tried out a rebreather, which is just about the weirdest experience possible for someone who dives traditional open circuit scuba on a daily basis.

What's in the Tank?


The Post Dive Cocktail
After a lovely, 75-minute multilevel dive, my client walked straight off the dive boat and straight into the beach bar where he ordered one ice cold beer after

4 Types of Freediving Training That You Can Do At Home
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.

5 Benefits of Becoming a Specialty Instructor or Master Scuba Diver Trainer
PADI Specialty Instructors can teach a variety of scuba specialties including nitrox, deep, wreck, cavern and scooter diving. Learn more about becoming a specialty scuba instructor.

Complacency Kills - An Argument for Following the Rules in Scuba Diving
Complacency in scuba diving kills. Read and argument for following safety rules and guidelines in scuba diving, not matter what your diving certification level.

True Tales of the Free Pool Demo - Scuba Diving Stories
When I worked at a large Caribbean resort, part of my job was to give a free pool demo everyday for guests who wanted to try diving for the first time. Read stories of my experiences giving the free pool demo.

Adaptive Scuba Gear for Divers With Disabilities
There is a wide range of equipment that can be used to make diving accessible to divers with physical disabilities.

Becoming a Scuba Instructor by Suzy Phipps
Information about becoming a PADI Scuba Instructor including the instructor training program, the role of a scuba instructor, and continuing education options after instructor certification.

Ahmed Gabr Sets New Deep Diving World Record
Deep Diving World Record - Ahmed Gabr reached 332.35 meters, setting a new Guiness World Record for deep scuba diving on Sept 18, 2014.

Great Pacific Garbage Patch (An Island of Trash)
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.

Great Pacific Garbage Patch (An Island of Trash)
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.

Great Pacific Garbage Patch (An Island of Trash)
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.

Great Pacific Garbage Patch (An Island of Trash)
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.

Great Pacific Garbage Patch (An Island of Trash)
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.

Great Pacific Garbage Patch (An Island of Trash)
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.

Diving Destinations, Travel and Dive Site Reviews - Scuba Dive Around the World
Do you need an idea of where to dive? Here are dive sites reviews, photos, and listings of diving destinations around the world, as well as profiles of aquatic life you will find in different parts of the world.

Technical Diving (Tec, Tek, Tech)
Technical diving, also known as Tec, Tek, or Tech Diving, uses specialized techniques and equipment to exceed recreational dive limits of time, depth, and penetration. Types of technical diving include decompression diving, trimix diving, wreck diving, and cave diving.

4 Ways for Scuba Divers to Contribute to Citizen Science
Divers without specialized conservation backgrounds can participate in conservation by becoming citizen scientists. Learn four ways that every diver can help.

Freediving Site: Banco Chinchorro
Freediving in the Marine Park of Banco Chinchorro, Mexico . Freedivers can visit shipwrecks, swim along pristine coral reefs, and even dive with crocodiles.

Freediving Site: Cenote Angelita, Riviera Maya, Mexico
Cenote Angelita in Mexico's Riviera Maya is an intermediate to advanced freediving site, with a depth of approximately 130 feet.

Freediving in the Riviera Maya
The Riviera Maya is a new, and incredible freediving destination, offering everything from saltwater wrecks, reefs, and whale sharks to freshwater cenotes.

Freediving on Wrecks in the Riviera Maya
Freedivers can vist ship wrecks in Cozumel, Mexico.

Freediving in Cenotes
Freshwater cenotes in Mexico's Riviera Maya are fantastic freediving sites, offering freshwater, clear visibility, and stunning light effects.

Freediving Site: The Pit Cenote, Riviera Maya, Mexico
One of the best freediving sites in the world is the Pit, a cenote in Mexico's Rivera Maya.

Freediving Cenote Azul, Laguna Bacalar
Cenote Azul, located in Laguna Bacalar on Mexico's Yucatan Peninsula is an excellent freediving site, and has been host to several freediving competitions.

Freediving Site: Sailfish in Isla Contoy
Freediving with Sailfish off of Isla Contoy in Mexico

Freediving the Mesoamerican Barrier Reef
Freediving the Mesoamerican Barrier Reef system in the Riviera Maya, Mexico.

Freediving Laguna Kaan Luum
Laguna Kaan Luum, located in Mexico's Riviera Maya, is an excellent freediving site for depth practice and training.

Freediving Site: Bull Sharks in Playa del Carmen
Freediving with bull sharks in Playa del Carmen is an exciting adventure for experienced freedivers.

Freediving Site: Whale Sharks
Freedivers can dive with whale sharks near islas Holbox and Contoy, off the northeastern tip of the Yucatan Peninsula in Mexico.

How to Relax When Scuba Diving - Scuba Diving Hints and Tips
Before a diver can enjoy the underwater world, he must feel relaxed and in control. Here is how to relax before a dive.

6 Ways That Learning to Cave Dive Benefits Recreational Divers
Cave diving introduces divers to advanced trim, buoyancy, and propulsion techniques. Learn 6 ways that cave diving training can improve your diving.

Alain Pocobelli - Cave Diving in Mexico
Profile of Alain Pocobelli, owner of Cave Diving Training in Playa del Carmen, Mexico. Alain Pocobelli is About.com Scuba's guest author to cave diving. He is an accomplished cave diver, side mount diver, and cave instructor.

The PADI Divemaster Course
An overview of the PADI Divemaster Program, including the content of the course and options for course format and length

The Take Home Message About Australia Diving
Scuba diving in Australia has it all, from reefs, to shipwrecks, to caves.

Introduction to Scuba Diving in Australia
An overview of Australia's diving by region - from the Great Barrier and Ningaloo Reefs, to Mount Gambier's Caves, to Wreck Diving and Kelp Diving.

South Australia - Cave Diving and Great White Sharks
South Australia is home to Australia's Mount Gambier (famous for cave diving sites such as Tank Cave) and great white shark diving.

South Australia - Scuba Diving With Leafy Seagragons
South Australia is home to the Leafy Seadragon, a famous marine pipefish that is a must see once in every scuba diver's career.

Western Australia - Reefs, Whale Sharks and Cave Diving
Western Australia is home to the Ningaloo Reef System, Cave, and even Whale Sharks, making it atractive to scuba divers of all experience levels.

Northern Territory, Australia
The Northern Territory, in Australia, has a thriving local dive community near the Capital of Darwin -- but watch out for Crocs!

Interesting Facts for Divers Heading to Australia
Australia is not only has interesting underwater fauna, a diver's trip to the continent is sure to be full of exciting terrestrial creature sightings as well!

Diving In and Around Australia
Australia is home to a great variety of diving, from cave diving in the desert to the great barrier reef. Learn about the different regions.

Diving in Queensland, Australia
The Great Barrier Reef is a popular dive site in Queensland, Australia, offering colorful biodiversity and even wreck diving!

Scuba Diving in New South Wales (NSW), Australia
Scuba diving in New South Wales offers a variety of marine life, including shark species, sea turtles, and manta rays.

New South Wales - Fish Rock Cave Scuba Diving
Fish Rock Cave, in New South Wales Australia is a top dive site and is home to hundreds of gray nurse sharks.

Scuba Diving in Victoria, Australia
Victoria, a state in Australia, is home to excellent temperate-water wreck and scuba diving.

Victoria, Australia - Home to the Weedy Sea Dragon
Victoria, Australia is home to the weedy sea dragon, a creature that all scuba divers shoudl encounter at least once in their scuba diving careers.

Tasmania, Australia - Diving in Kelp Forests and Wrecks
Tasmania is an island of the southern coast of Australia, boasting excellent scuba diving in kelp forests and on shipwrecks.

How to Frog Kick - Finning Techniques for Scuba Diving
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.

How to Frog Kick - Finning Techniques for Scuba Diving
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.

How to Frog Kick - Finning Techniques for Scuba Diving
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.

How to Frog Kick - Finning Techniques for Scuba Diving
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.

How to Frog Kick - Finning Techniques for Scuba Diving
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.

Radiator Wetsuits Review - Scuba Diving Gear
Radiator wetsuits produces high-quality, thin wetsuits with excellent thermal protection by using a patented neoprene hybrid. Read a review and buy radiator wetsuits.

Schools of Silversides Fish in a Coral Cave at Xcalak, Mexico
Photo of the schools of silversides that fill coral caves in Xcalak's dive sites. Scuba divers can swim through these shimmering schools of fish.

Technical Sidemount and Rereational Diving Photos in Xcalak Mexico
Photo of a scuba diver using a sidemount equipment configuration in Xcalak Mexico. XTC dive center in Xcalak caters to all types of divers, from open water, recreational diver to advanced technical and sidemount divers.

Open Water Skill: Controlled Seated Entry
How to perform the open water skill - Controlled Seated Entry.

Open Water Skill: Controlled Seated Entry
How to perform the open water skill - Controlled Seated Entry.

Open Water Skill: Proper Weighting
How to perform the Open Water skill 'Proper Weighting'

Open Water Skill: Proper Weighting
How to perform the Open Water skill 'Proper Weighting'

Open Water Skill: Proper Weighting
How to perform the Open Water skill 'Proper Weighting'

Photo of the Scuba Diving Pier of XTC Dive Center in Xcalak, Mexico
The wooden pier at XTC dive center in Xcalak, Mexico is reminiscent of the Caribbean thirty years ago. This quiet, sleepy dive town has some of the best diving in Mexico due to its status as a protected marine sanctuary.

Photo of the Healthy Coral Reef in Xcalak, Mexico's Marine Reserve
The coral in Xcalak, Mexico, unlike the coral in many other diving areas in the Caribbean, is still healthy and colorful because Xcalak is part of protected marine reserve sanctuary.

Scuba Divers in Xcalak, Mexico Swim Through Schools of Giant Tarpon Fish
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.

Scuba Diving With Manatees in Xcalak Marine Reserve in Mexico
Photo of a manatee. Scuba divers in Xcalak are near a manatee reserve, and lucky divers may see a curious manatee who has ventured out of the mangroves to the reef.

Large Groupers Are Still a Frequent Sighting in Xcalak Marine Reserve
Large groupers are still seen on nearly every dive in Xcalak. The presence of these top predators helps to keep Xcalak's ecosystem in balance.

Scuba Diving Regulators (First and Second Stages)
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.

Types of Freediving - Apnea Disciplines
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.

Yellowhead Jawfish - Opistognathus aurifrons - Caribbean Reef Fish Identification Guide
The Yellowhead Jawfish, Opistognathus aurifrons, is one of my favorite fish. These tiny, iridescent fish with yellow heads dig burrows in the sand. Divers can find them peering out of their burrows near the reef, or floating just above their hiding holes. Learn to identify Yellowhead Jawfish and other Caribbean reef fish using this illustrated guide.

Great Barracuda - Syphraena barracuda - Caribbean Reef Fish Identification
The Great Barracuda, Syphraena barracuda, is a predatory fish with a jaw full of sharp, pointed teeth. Learn to identify the Great Barracuda and other Caribbean reef fish using this illustrated guide.

Lionfish - Caribbean Reef Fish Identification Guide
Lionfish have become a common sight on Caribbean reefs. While they are pretty, lionfish are an invasive species and are slowly decimating fish populations across the Caribbean. Learn to identify a lionfish and other Caribbean reef fish using this illustrated guide.

What Causes Coral Diseases?
What causes coral diseases? Coral diseases may be caused by bacteria, fungi, or viruses. Other stress factors such as sedimentation and pollution may predispose coral to diseases.

5 Tips for Stopping the Spread of Coral Diseases
How can scuba divers help to stop the spread of coral disease? Coral diseases are one of the major threats to the survival of coral reefs. Learn how divers can help to stop coral diseases from destroying reefs.

20 Common Reef Fish Species - Florida and the Caribbean
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.

How to Identify a Goliath Grouper - Epinephelus itajara - Caribbean Fish Identification
How to identify a Goliath Grouper, Epinephelus itajara, on a scuba dive. Groupers have thick lips and huge, down-turned mouths. Learn to identify groupers and other Caribbean fish using this illustrated guide.

Spotted Drum Fish - Equetus punctatus - Caribbean Fish Identification Guide
Spotted Drums are quite unusual - the adults display both bold spots and thick stripes, while the juvenile Spotted Drum fish has long, elegant dorsal fins. Learn to identify Spotted Drums and other Caribbean fish species here.

Blue Tang - Acanthurus coeruleus - Caribbean Fish Identification Guide
Blue tangs, Acanthurus coeruleus, are small, round fish found on shallow to medium depth reefs. Divers may recognize this fish as Dori from finding nemo. Learn how to identify Blue Tangs underwater using this illustrated guide to Caribbean reef fish.

How to Identify a Peacock Flounder - Bothus lunatus - Caribbean Reef Fish Guide
Peacock Flounders, Bothus lunatus, are perhaps some of the most unusual fish on the reef. These flat fish can be found hiding in the sand with their pectoral fins sticking straight up. Learn how to identify Peacock Flounders and other Caribbean reef fish with this illustrated guide.

Scrawled Cowfish - Acanthostracion quadricornis - Caribbean Fish Identification Guide
Scrawled Cowfish are a type of boxfish. Although they have a shape reminiscent of a pufferfish, the Scrawled Cowfish does not inflate as a defense, but instead relies on camouflage. Learn to identify a Scrawled Cowfish and other Caribbean reef fish using this illustrated guide.

Sharpnose Pufferfish - Canthigaster rostrata - Caribbean Reef Fish Identification Guide
The Sharpnose Pufferfish, Canthigaster rostrata, is a small, gold and blue pufferfish that can be found on reefs across the Caribbean. Learn to identify the Sharpnose Pufferfish and other Caribbean reef fish using this illustrated guide.

Yellow Goatfish and Yellowtail Snapper - Mulloidichthys martinicus and Ocyurus chrysurus - Caribbean Reef Fish Identification Guide
Many divers confuse Yellow Goatfish (Mulloidichthys martinicus) and Yellowtail Snapper (Ocyurus chrysurus) because of their similar coloration and the fact that they may school together in large groups on shallow reefs. Learn to identify goatfish and snapper using this illustrated guide to Caribbean fish.

White Spotted Filefish - Cantherhines macrocerus - Caribbean Reef Fish Identification
The White Spotted Filefish, Cantherhines macrocerus, is a large, orange colored flat fish that sometimes has white spots. Filefish all have a spine (their file) on their dorsal fin which is used for defense. Learn how to identify a White Spotted Filefish and other Caribbean reef fish using this illustrated guide.

French Grunts and Blue-Striped Grunts (Medium-Sized Yellow Striped Fish)
French Grunts (Haemulon flavolineatum) and Blue-Striped Grunts (Haemulon sciurus) are small, yellow, striped fish found in the Caribbean, Florida, and other regions of the Western Atlantic. This guide helps divers to identify and differentiate between common Caribbean reef fish.

Smooth Trunkfish - Black and White Boxfish - Lactophrys triqueter
The Smooth Trunkfish, Lactophrys triqueter, is one of my favorite Caribbean reef fish. This cute little black and white spotted fish can be seen on sand flats and reefs across the Caribbean concertedly blowing at the sand in an attempt to uncover food.

Trumpetfish - Aulostromus maculatus - Caribbean Fish Identification
Trumpetfish, Aulostromus maculatus, are easy to overlook during a scuba dive. These long, thin, stick-like fish camouflage well with their surroundings. Learn to identify Caribbean and Florida reef fish here.

Sand Diver - Lizardfish - Synodus intermedius
Sand Divers, Synodus intermedius, are a type of lizardfish that can dramatically alter the intensity of their colors to camouflage with their surroundings. See photos and learn how to identify a Sand Diver, as well as other Caribbean reef fish, here.

Banded Butterflyfish and Foureye Butterflyfish - Chaetodon striatus and Chaetodon capistratus - Caribbean Reef Fish Identification
Butterflyfish are commonly seen on Caribbean Reefs and in Florida fluttering across the reefs in pairs. Butterflyfish can be easily distinguished from Angelfish by the length of their dorsal and anal fins.

Gray Angelfish, Queen Angelfish, and French Angelfish - Pomacanthus arcuatus, Holacanthus ciliaris, and Pomacanthus paru - Caribbean Fish Identification
Angelfish are easy to identify - if were to rotate them tail down, they would have a silhouette in a traditional angel shape. Learn to identify Gray Angelfish (Pomacanthus arcuatus), Queen Angelfish (Holacanthus ciliaris), and French Angelfish (Pomacanthus Paru) and other fish common to the Caribbean and Florida here.

Squirrelfish - Holocentrus adscensionis - Caribbean and Florida Reef Fish Identification
The Squirrelfish, Holocantrus adscensionis, has huge dark bug eyes and spiky fins like a mohawk. I like to think of it as a punk-rock fish. Learn how to identify squirrelfish and other Caribbean and Florida reef fish here.

How to Identify a Porcupinefish or Pufferfish
Porcupinefish, Diodon hystrix, are a type of pufferfish commonly found in the Caribbean and in Florida. Learn to identify the porcupinefish as well as other Caribbean tropical fish using this illustrated guide.

The Atlantic and Caribbean Lionfish Invasion - Facts and Information for Scuba Divers
The lionfish, Pterois volitans, is an invasive species in the Caribbean and the Atlantic. Learn facts and information about the lionfish invasion.

Sea Turtle Facts for Scuba Divers
Learn about sea turtles. Here are facts about sea turtle reproduction, mating, habitats, feeding,

Flounders - Facts, Information and Trivia for Scuba Divers
Flounders are among some of the most difficult fish to spot underwater. They are also some of the most interesting. Here are some interesting flounder facts and trivia for scuba divers.

Avoid Problems Associated With Diving in Clear and Turbid Water - Considerations for Low Visibility
Scuba diving in clear water and in areas with poor visibility requires special considerations. Learn how to use references and other clues while diving so that you do not become disoriented underwater.

Factors That Affect Visibility Underwater When Diving
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.

Dissimilar Cylinder or Tank Gas Matching and Baseline Conversions - Scuba Diving
Gas matching between dissimilar scuba tanks or cylinders may seem complicated, but there is s simple method to gas match that avoids math entirely. This article outlines how to gas match between dissimilar tanks or cylinders.

Buoyancy for Scuba Diving - Don't Swim With Your Hands!
What is one of the worst things a diver can do when attempting to establish neutral buoyancy? Swim with his hands! And here is why . . .

Natural Navigation for Scuba Diving
Do you ever get lost diving? Here are tips on how to use natural navigation underwater to maintain a sense of direction and orientation while scuba diving.

Passive Communication and Scuba Diving
Not all underwater communication involves hand signals. In fact, a good scuba diving team can communicate with almost no hand signals at all. Adept divers use passive communication to stay in contact with each other throughout a dive.

Buoyancy Control Devices for Scuba Diving
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.

Air Consumption Rates for Scuba Diving
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.

Scuba Diving: Figuring Out How Long Your Air Will Last
A step by step guide explaining how to use your air consumption rate to calculate how long you can stay underwater. This guide uses Imperial units. Page 10.

Calculating (via Metrics) How Long Diver's Air Will Last
Explaining how to use a scuba diver's air consumption rate to calculate how long you can stay underwater. This guide uses Metric units. Page 11.

Definition of an Air Consumption Rate for Scuba Diving and the Importance of Knowing Your SAC and RMV Rates
A diver's air consumption rate is the amount of air that he uses in a given amount of time on the surface. A diver may use his air consumption rate for diving planning, as well as for several other purposes.

Normal and Good Air Consumption Rates in Scuba Diving
What is a normal/ average air consumption rate and what is a good air consumption rate in scuba diving. Instead of focusing on what is

What Is a Surface Air Consumption (SAC) Rate?
A measurement of the speed at which a scuba diver consumes his air. Learn difference between SAC Rate and RMV Rate, and when SAC Rate is useful.Page 4.

What Is a Respiratory Minute Volume Rate in Scuba Diving - RMV Rate Definition - RMV Rates vs SAC Rates
A Respiratory Minute Volume (RMV) Rate in scuba diving is a measurement of the volume of a gas that a diver uses in one minute on the surface. Learn the difference between an RMV Rate and a SAC Rate, and in which situations a diver should use a RMV Rate.

How to Collect Data for Determining Your Air Consumption Rate During Normal Fun Dives
One method of measuring a diver's air consumption rate involves collecting data during normal recreational dives. Divers must record their start pressure, end pressure, average depth and dive time, and then plug these numbers into the SAC Rate or RMV Rate formulas as desired.

Dedicate a Dive to Measuring Your Air Consumption Rate
A diver may plan a dive to collect data on his air consumption rate. Such a dive frequently involves recording data while at rest, swimming normally, and swimming quickly.

Scuba Diving: Formula for Calculating SAC Rate
Formulas for calculating a scuba diver's surface air consumption rate (or SAC Rate) in both Metric and Imperial format.

Scuba Diving: Formula for Calculating Your RMV Rate
Formula for calculating a diver's respiratory minute volume rate, given in both Imperial (PSI, cubic feet) and Metric (bar, liters) formats.

Scuba Diving Tips - Always Purge Your Regulator After Closing Your Tank Valve
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.

What Is a Pressure Group in 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

What Is Residual Nitrogen Time (RNT) in 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.

Task Loading and Extra Gear - What to Carry When You Scuba Dive
Carrying extra dive gear underwater can lead to task loading and extra drag. Here are tips on streamlining dive gear for a more enjoyable and safer diving experience.

Learn About the Types of Diver Down Flags and Their Use
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.

Oxygen Is the Recommended First Aid for Nearly All Scuba Diving Accidents and Injuries
Adminstration of 100% pure oxygen is the recommended first aid for nearly any scuba diving injury or accident. Breathing pure oxygen on the surface will help to treat decompression sickness, arterial gas embolism, pulmonary barotrauma, and near drowinings.

What Should You Do If You Are Narced - How to Reduce and Avoid Nitrogen Narcosis When Scuba Diving
A diver who experiences nitrogen narcosis should ascend until the narcosis subsides. Learn tricks to avoid and reduce nitrogen narcosis here.

Scuba Diving in Xcalak Mexico - Xcalak Is One of Mexico's Best Kept Diving Secrets
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.

Photos of the Wreck of the Philo Scoville in Tobermory, Canada.
Photos and description of the Wreck of the Philo Scoville in Tobermory, Canada.

Photos of the Wreck of the Sweepstakes in Tobermory, Canada
Photos and description of the wreck of the Sweepstakes in Tobermory, Canada. The Sweepstakes sank in 1885, and rests in clear water in excellent condition.

Photos of the Wreck of the Wetmore in Tobermory, Canada
Photos and description of the Wreck of the Wetmore in Tobermory, Canada. The Wetmore sank in 1901 during a storm.

Photos of diving the Wreck of the Forest City in Tobermory, Canada
Photos and description of diving the wreck of the Forest City in Tobermory, Canada.

Photos of the Wreck of the Caroline Rose in Tobermory, Canada
Photos and description of diving the wreck of the Caroline Rose in Tobermory, Canada. The Caroline Rose is pictured on the back of the old Canadian $100 bill.

Photos of the Wreck of the Niagara II in Tobermory, Canada
Photos and description of the wreck of the Niagara II in Tobermory, Canada. The Niagara II was sunk in 1999 to create an additional dive site, as is an interesting shipwreck for divers of al certification levels.

Photos of the Wreck of the Arabia in Tobermory Canada
Photo and description of the wreck of the Arabia in Tobermory, Canada. The Arabia sank in Tobermory in 1884 . . .

Photos of the Wreck of the City of Cleveland in Tobermory, Canada
Photos and description of diving the wreck of the City of Cleveland in Tobemory, Canada. The City of Cleveland sank in 1901 after being swept off course during a strong storm.

Photos of the Wreck of the City of Grand Rapids in Tobermory, Canada
Photos of the wreck of the City of Grand Rapids in Tobermory, Canada. The City of Grand Rapids caught fire and sank in 1907.

Uses for an Ocho or Snorkel Keeper - Connect a Snorkel to a Mask
The traditional use of an ocho, or snorkel keeper, is to connect a snorkel to a mask. Read more about the various uses of snorkel keepers, or ochos.

Uses of an Ocho or Snorkel Keeper - Snorkel Keepers Can Be Used to Hang a Regulator From a Buoyancy Compensator
One use of an Ocho or Snorkel Keeper is to connect a regulator to a buoyancy compensator. Learn about the various uses of snorkel keepers, or ochos.

Inland Scuba Diving - Where to Dive if You Are Far from the Ocean
Where can you dive if you don't live by the ocean? Inland scuba divers can train and recreationally dive in lakes, quarries, rivers, flooded mines, and even caves. No ocean, no problem!

Australia Diving
There is much more to scuba diving in Australia than the great barrier reef! Learn about local diving, cave diving, and more in this vast and varied continent.

Shark Feeding and Baiting Dives -- Interview with a Conservation Expert
Is shark feeding on scuba dives ever acceptable? Read shark expert Dr. David Delaney's opinion. It's not what you might think!

Follow Your Head - Any Easy Tip for Buoyancy Control and Scuba Diving
Good buoyancy control can be one of the most difficult skills to master. Learn how to

Breaking Into the Marine Conservation Industry - Internships and Jobs
5 tips for breaking into the marine conservation industry. A volunteer position can help you gain experience, but choose your program carefully . . .

Scuba Diving Book Review - Caverns Measureless to Man by Sheck Exley


The Basics of 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.

Type of Alternate Air Source Regulators for Scuba Diving
Learn about the three main types of alternate air source regulators for scuba diving: the octopus, the long hose, and the integrated alternate air source. Which alternate air source regulator is right for the type of scuba diving that you do?

Dive Gear Basics - Choosing Your Gauges and Monitoring Devices
A diver must carry a means of monitoring his depth, time, and tank pressure underwater. Many types of gauges for monitoring dive parameters exist. Learn about the dive computers, bottom timers, depth gauges, pressure gauges, and dive watches and the differences between them here.

Scuba Diving Stories - The Golden Rule for Divers
The golden rule of scuba diving states that any diver can end the dive for any reason, no questions asked! This important rule is frequently overlooked in the recreational diving community.

Turtle Fins - Photos of 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.

Back Plate and Wings - Photos of a Back Plate and Wings Style Buoyancy Compensator
Learn about the back plate and wings style of buoyancy compensators or BCDs. Scuba divers purchasing a buoyancy compensator should understand the different styles and features of buoyancy compensators before buying one. Page 9.

Scuba Diver's Dictionary and Glossary - Definitions and Explanations of Scuba Diving Terminology Slang and Jargon
Definitions of scuba diving terminology and jargon. Use this glossary and encyclopedia to easily find definitions and and explanations of important scuba diving concepts. Now it's your turn to talk like an experienced diver using proper terms and diver slang!

Scuba Diver's Dictionary and Glossary - Definitions and Explanations of Scuba Diving Terminology Slang and Jargon
Definitions of scuba diving terminology and jargon. Use this glossary and encyclopedia to easily find definitions and and explanations of important scuba diving concepts. Now it's your turn to talk like an experienced diver using proper terms and diver slang!

Scuba Diver's Dictionary and Glossary - Definitions and Explanations of Scuba Diving Terminology Slang and Jargon
Definitions of scuba diving terminology and jargon. Use this glossary and encyclopedia to easily find definitions and and explanations of important scuba diving concepts. Now it's your turn to talk like an experienced diver using proper terms and diver slang!

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.

Where to Dive - Diving All Around the World
Everything you need to know about where to dive all around the world. All about local diving, dive destinations, dive resorts, dive vacations, dive sites, and dive operators.

Stinging Hydroids - Facts, Treatment, Basics
Stinging hydroids are members of the Hydrozoa class, which includes the portuguese man of war and fire coral.

Identifying Stinging Hydroids - Feathers, Plumes, Bushes, Ferns, Weeds, Plants
Stinging hydroids may resemble feathers, ferns, bushes or weeds. They have been observed in a wide variety of colors, depending upon the species.

How Do Stinging Hydroids Sting - Nematocysts, Neurotoxins, Venom
Stinging hydroids sting prey with a nematocyst, a specialized cellular structure that can be fired from the cell into prey.

Identifying, Treating, and Preventing Stinging Hydroid Stings
Most stinging hydroid injuries are painful, but not dangerous. Blisters and rashes are common results of contact with a stinging hydroid. Divers who experience allergic reactions should contact a doctor.

Stinging Hydroid Facts Information and Trivia - Polyps, Commensalism, and Anti-Bacterial Agents
Even though stinging hydroids can cause painful injuries, they are still fascinating creatures. Here are some stinging hydroid facts and trivia.

Risks and Signs of Carbon Dioxide in 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.

Lionfish Invasion - How Can Scuba Divers Help to Reduce the Number of Lionfish in the Atlantic
Scuba divers can help to reduce the number of lionfish in the Caribbean. Learn how you can help!

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 . . .

Patent Foramen Ovale and How It Affects 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.

Online Scuba Diving Certification Courses Information
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.

Seasickness and Scuba Diving: Can You Vomit Underwater?
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.

Sharks May Go Extinct as Finning Decimates Populations
Are sharks endangered? Sharks are close to extinction. One of the main threats to sharks is the harvesting shark fins for use in shark fin soup.

5 Rules of Accident Anaylisis for Cave Diving
The five rules of accident analysis in cave diving are guidelines developed by examining diver's mistakes and creating rules avoid repeating them.

Sound Travels About 4 Times Faster in Water Than in Air
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.

Scuba Diving: Blacking Out While Free Diving
Shallow water black out is a risk of freediving, but it can be avoided with proper procedures. What causes shallow water black out and how you can avoid it.

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

Oxygen Toxicity, Enriched Air Nitrox, 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.

Never Hold Your Breath: Important Scuba Diving Rules
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.

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.

Pre-Dive Safety Checks Make Scuba Diving Safer
The scuba diving pre-dive safety (or

Scuba Divers Make A Final Okay During the Pre-Dive Safety Check - The Pre-Dive Safety Check for Scuba Diving
The scuba diving pre-dive safety (or

Scuba Divers Check Their Air and Regulators During the Pre-Dive Safety Check - The Pre-Dive Safety Check
The scuba diving pre-dive safety (or

Scuba Divers Check Their Releases During the Pre-Dive Safety Check - The Pre-Dive Safety Check for Scuba Diving
The scuba diving pre-dive safety (or