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Scuba Diving Training

Learn about scuba diving skills, trainings, certifications and lessons on how to make your scuba bottom time safe, fun and lasting! Also, see what it's like to scuba dive in crazy situations, read our Lessons for Life, get underwater photography tutorials and check out expert scuba dive hacks for any and every dive condition.

Buoyancy Calculator—How Much You Need in Dive Weights

Struggling to find the right amount of weight for scuba diving? Here's how you can test and calculate just how much weight you need for scuba diving.

The Ultimate Guide to Nitrox Diving

What is nitrox diving, what are the benefits of nitrox vs. air and how do you get your enriched air certification? Here’s everything divers need to know.

How to Find a Doctor for Scuba Medical Advice

It's wise to schedule a medical checkup before embarking on a dive trip—even better if you can see a doctor who specializes in diving. Thankfully, there are resources to help you find one.

Recent Articles

Undersea Archives: How to Get the Most Out of Your Dive Log Book

A logbook is a record of your dive history and training, but how you approach your log depends on what works best for you.

Weighed Down

Learn from this diver's experience how to avoid the dangers of wearing too much weight underwater.

Think Big: How To Put Grouper in the Spotlight

Groupers have been a favorite fish since the pioneering days of diving. Widespread in the tropics and subtropics, they are slow-moving, curious and intelligent, and many are highly colored. Their big eyes and rubbery lips give them a cartoonish charisma. Groupers are long-lived and can become so infatuated with divers that they follow them closely— much to the enjoyment of any shooter.

How Common Are Stranded Sharks Like the Frozen One in Cape Cod?

In this edition of Ask a Marine Biologist, Dr. David Shiffman answers questions recently sparked by a frozen shark found in Cape Cod.

Ocean's Calling

Polar expedition guide Kayvon Malek gives advice on how to be a successful diver for polar cruises in locations such as Antarctica, Alaska and the Arctic.

Ask DAN: What Should I Know About Oxygen Toxicity?

Everything you always wanted to know about oxygen toxicity, including what's happening as well as signs and symptoms.

The Dive Life: Exploring the Connected Community of Scuba Divers

Underwater photographer Brent Durand explores what it means to be a dive community. With input from the public, he will explore how our connection as divers is far stronger than our differences in location or profession. Topics he'll cover include travel, family diving, conservation, community and everything in between.