Vis Island, Croatia

THE CRYSTAL-CLEAR EASTERN ADRIATIC SEA is promising and seductive. The tiny islands, with their rocky beaches, upright cliffs, and hidden lakes, offer a variety of environments and ecosystems that are among the Mediterranean’s most intact and pristine. The southern part of the Adriatic’s Croatian side has steep, rocky plateaus with plenty of bridges, cracks, and caves. The sea has opened gaps in the porous rocks, carving and shaping cathedrals entirely built of limestone. 

A rebreather diver observes a common cuttlefish

Gulf of Maine

The drive to Eastport from my home in southern Maine would typically take about four and a half hours, but I was towing my boat so I prepared for more than six hours on the road.

gray seal

Operation Rising Sun

The story of the search for the Japanese submarine I-52 is one of two discoveries separated by time and purpose. In the dark of night in the Atlantic Ocean in 1944, U.S. Navy anti-submarine ships searched for a clandestine meeting between German and Japanese naval crews. Operating on captured intelligence, they sought to surprise and sink the two submarines. Half a century later, the I-52 still rested undiscovered on the seafloor, but this time the search was in the dark of the deep ocean in pursuit of possibility, not destruction.

anti-aircraft guns still point skyward on the wreck of the I-52

The Maldives

WHILE THE WORLD WAS STILL MOSTLY LOCKED DOWN with travel restrictions, my social media feed was alive with gorgeous photos from the Maldives. The Maldives opened sooner than most foreign dive destinations, so there was ample photographic inspiration for our trip in May. The online coverage included the whale sharks, manta rays, tiger sharks, and […]

divers with a manta ray

Kavieng

As a diver and photographer, I seek remote locations offering unparalleled underwater experiences. The farther away and the fewer the people, the better. Papua New Guinea is such a place.

A split image shows the house reef at Lissenung.

A Tale of Two Passes

This is Fakarava — a remote atoll in French Polynesia that feels more like a gateway to another world than a dive destination. Nestled in the remote Tuamotu Archipelago, this UNESCO biosphere reserve is where discriminating divers come to leave the ordinary behind.

The Tumakohua Pass of South Fakarava

Carbon Monoxide Safety

What is a safe carbon monoxide (CO) level in our breathing air? Learn the effects of CO poisoning and how the limits are derived.

Carbon Dioxide Safety

There are many standards and guidelines for safe limits, including the results of various occupational health and safety studies on the effects of extended exposure. For diving, the situation is different. So what are safe limits for recreational diving with much shorter exposures than navy divers? Particularly, what is a safe limit for carbon dioxide (CO2), the most abundant potential contaminant?