Macro diopters reduce your minimum focus, magnify the subject and create a crisper image.

ASK DAN: What should I do before and after diving to avoid accidents?

Marine biologist Dr. David Shiffman provides the ocean facts you want to know in this marine Q&A!

Becoming a technical diver starts with learning how to use new equipment and air blends.

Maps for marine navigation and weather, as well as tide and nautical charts, are some of the tools that can help you read ocean conditions.

The excitement of a new experience causes a missed predive safety check, triggering an emergency at the start of a night dive.

A diver’s buoyancy is dynamic, constantly altered by pressure as the diver ascends and descends.

Underwater shutterbugs should prepare for wide-ranging conditions in this archipelago of plenty, from World War II wrecks to mantas.

A beginner's guide to how underwater photography snoots work and how to master them.