Dolphins to Port, A Diver in Trouble
In a rush to enter the water, a diver did not check the tank valve, leaving them in a dangerous spot. Read more about the incident.
Alert Diver Issue: Q2 2010
Shooter: Howard Hall
Underwater cinematographer Howard Hall had humble beginnings and is now known for his spectacular underwater IMAX movies. Read more about Howard Hall and his career.
Digital Effects Using High Dynamic Range
High dynamic range (HDR) is a clever digital process that will allow you to generate exceptional detail in still photos by combining the best elements from multiple shots into a single image. Read more about this practice.
When Garbage Doesn’t Die
Garbage, especially plastics, can be found all over the world in all kinds of bodies of water. Read more about what is being done and what divers can do help clean it all up.
Cayman Blue
The Cayman Islands have become an addiction for a National Geographic photographer. Discover why this person is so passionate about these islands.
Your Computer Fails: Now What?
What do you do when your dive computer fails? With the right backup instruments and techniques, you can keep diving safely. Learn more.
The Essential Maldives
Swift currents and beautiful coral atolls are a given when you dive the Maldives, but when you cruise the islands by liveaboard, there’s a new surprise at every mooring. From manta rays and whale sharks to beautiful reefs and idyllic beaches, enjoy the best diving experiences these famous islands have to offer.
Pushing the Envelope
Three accomplished dive photographers share how they’ve pushed the envelop in underwater photography. You can glean their tricks and secrets.
Assessing Basic Vital Signs
Vital signs can be helpful even to first aid providers with limited medical training. Sets of vitals that are outside normal ranges typically indicate the need for some treatment.
Study Update: PFO
If divers test positive for patent foramen ovale (PFO), they may choose to stop diving or take steps to mitigate future risks. A five-year DAN study analyzed those who underwent a closure procedure and those who did not.
