Words by Ken Merryman Strictly speaking, the term photogrammetry is the science of making measurements from photographs.  It means one can determine the true size of an object in a photo from the size of the object on the camera sensor knowing the camera lens and distance from the camera.  …

By Natalie Gibb A well-made map of an underwater cave is a beautiful thing. A cartographer must achieve a balance between the level of detail and the ‘big picture’ overview to create a usable map for cave divers. I am not an underwater cartographer, but I know a few, and …

A love letter to Newfoundland, the Truk Lagoon of Great White North, a destination that will fast become your new second home Words by Russell Clark “Sit yer-self down lads, I just cooked some of me home made moose sausages.” The first words from local legend Rick Stanley are …

Demystifying Dive Computers Words and Photography by Jill Heinerth In my previous article I looked into incident reports that fell outside of the data gathered by organizations such as DAN. In this article, I’m going to dive into the physiology of decompression, gradient factors, and conservatism strategies. When you …

“Old things become new with the passage of time” – Greek Proverb Words by Maria Fotiadi, Erikos Kranidiotis, Stelios Stamatakis The mines of Lavrion: a vast complex of tunnels, covering more than 46 square miles (120km2), that has produced unimaginable quantities of silver, lead and copper throughout the centuries.  Mining …

By Natalie Gibb I cave dive every day. Flooded caves are one of the most difficult dive environments on the planet, and my job requires monitoring a variety of factors all at once: navigation, control, my buddy, and host of factors such as dive time, depth, time to surface, no-deco …

By Steve Lewis There are few simple questions more difficult to answer than “How much is a rebreather?” More so if the person asking advice is a rebreather newbie about to buy their first unit. On the face of it, all that’s required is a straight dollar amount. Let’s …

Words and Photography by Jan Morton and Chris Straub  Gorgeous tropical reef dives are fine and dandy, but sometimes you just want to sink your teeth into a wreck… In 2014, through a combination of wanderlust and happenstance, Jan Morton found himself on Siquijor Island and fell in love with this …

By Steve Lewis I can’t recall which Charles Dickens character I am misquoting—I believe it is Ebenezer Scrooge from the novella A Christmas Carol — but the gist is this: “Income one pound; expenses 19 shillings and 11 pence; outcome bliss. Income one pound; expenses one pound and one penny; outcome misery.” Which …

Words by Kevin Brown Our exploration of the abandoned cold water mine started first with a plunge into the archives. While the Outaouais region Quebec owes its development largely to heavy mining, our industrial heritage has not had much historical value placed on it, and very little documentation exists …

By Natalie Gibb Not all caves are claustrophobic or extremely technical. If you have seen beautiful images of underwater caves and think they look amazing, but are unsure about the riskiness of the sport, this article is for you.  Although diving in flooded caves is exciting, the correct mindset …

By Natalie Gibb from Under The Jungle Never in my wildest dreams would I have imagined that I would like cave diving. Cave diving just sounds scary, and with no frame of reference, I couldn’t visualize swimming through a flooded cave. I had nightmare visions of being trapped in …

By Steve Lewis Nobody likes to screw up. None of us start marching along a pathway to a personal goal with the intention of losing our way and falling short—failing. Failing has the potential to ruin your day, or, at the other end of the spectrum of possible consequences, …

Garmin have announced the Descent Mk2S, its smallest watch-style dive computer – ideal for women and those with smaller wrists – designed for everyday wear and maximum functionality. Packed with innovative dive technology and Garmin’s most sought-after built-in activity sports profiles and wellness features, the Descent Mk2S is a tool …

Founded in 2015, NOVE has been making waves in the timepiece industry due to their comprehensive design that joins function and fashion. Representing the new sense of innovation in the field of watch design, their mission of creating beautiful, unique wristwatches pays homage to the rich history of craftsmanship …

Divers share a collective passion for the underwater world and a mutual fascination with the wondrous creatures of the sea. Perhaps it’s swimming with dolphins off the sunny coast of California they dream of, or diving side by side with whale sharks in the warm waters of Western Australia. …

Coral Guardian, a major force in coral reef conservation around the world, now offers a unique Christmas gift through it’s Adopt a Coral program, Coral Guardian. So spoil your loved ones, or yourself, while contributing to the protection of the ocean. Click here to adopt!  Each coral adopted comes …

NOVE recently announced their first automatic Swiss-made wristwatch via Indiegogo. The new Trident R150, or simply the Trident Automatic, is a sleek redesign of their Trident line of watches, a popular choice among divers due to its water-resistant capabilities up to 200 meters under water. Inspired by Poseidon and …

New mapping technology and a small manned submersible allow a team of scientists to 3D map a moment in history Text by Joseph Frey On July 15, 1942 Kapitänleutnant Hans-Dieter Heinicke, commander of German submarine U-576, would make a decision that would seal his fate and that of his …

Off the shores of Florida’s Key Largo, buried beneath almost two centuries of coral reef formations, lay remnants of the dark side of 1820s piracy and the illegal transport of slaves from Africa to Cuba Text By Joseph Frey Early on a hot July morning we head out into …

Looking for a new dive knife? Thresher Dive Supply have launched their all new Monad 5 inch titanium dive knife. The handle offers a fatter, rubberized grip for better wet-handling The injection-molded plastic used in the sheath is stronger. Granted, it’s not indestructible but it’s much less brittle. The …

Saginaw Bay’s warm waters serve as nursery grounds for many fish species and support the fisheries of both Saginaw Bay and the main basin of Lake Huron. Historically, inner Saginaw Bay contained rock reefs that provided critical habitats,spawning grounds, and juvenile areas for many native fish species. This includes …

SeaLife is introducing a new compact and lightweight underwater housing for Apple’s iPhone.  The new SeaLife SportDiver housing will allow divers to take photos and video with their iPhone down to 130 feet (40 meters).  The SportDiver can encase iPhone 7, 7 Plus, 8, 8 Plus, X, Xr, Xs, …

Shearwater have announced their newest dive computer, the PEREGRINE, a simple and accessible, full colour, multi-gas dive computer that will be easy to use for divers of all experience levels. The Peregrine has four diving modes – Air, Nitrox, 3 Gas Nitrox and Gauge. With simplified recreational dive modes, full …

By Alex Lemaire Underwater exploration is one of the most amazing activities on the planet. You can discover a whole new world that only a few people get to see and experience. Some of the explorers took their passion to the next level. They spent their life looking for …

Aging divers and divers with physical limitations could find freedom within their gear configuration… Words by: W. H. “Hank” Halliday Recent issues of DIVER have featured sidemount diving: one focused on the need to practice skills and the other related to cave diving. I suggest a third, covering a …

One of diving’s most iconic artificial reefs, Grand Cayman’s Kittiwake, is revisited by one of its former crew members Words and Photography by Drew McArthur A naval vessel is much more than just a place of work and a roof above the heads of the people who serve on …

The Pulse 8X from JW Fishers has provided operators with the right tool for the job for over 25 years and is still the leading underwater metal detector in use worldwide by law enforcement, military, fire and rescue departments, public safety dive teams, commercial divers, and wreck hunters. The …

By Steve Lewis A few years back I wrote a book called “The Six Skills…” One of the skills mentioned in it was Situational Awareness. At the time, Situational Awareness (SA) seemed like a neat catch-all phrase, and it still sounds good as far as it goes. I wanted …

Words By Steve Lewis Even if you’re a cold-water diver, there’s a strong case to be made for doing your next advanced diver training in warm water (read tropical or sub-tropical temperatures). Let me explain. When we think about what we expect to get out of technical diving classes, …

As the coronavirus (COVID-19) pandemic continues to sweep the globe, people from all corners of the world are coming together to help create solutions in response to the crisis. For one, a team of programmers, scientists, and technicians in the Czech Republic has been putting their skills to use …

DIVER Photographer Maxwel Hohn shares five preparation tips for your cave course I just completed my TDI Full Cave Diver certification in Puerto Aventuras, Mexico. I’ve wanted to do this course for some years now, as it can help you become a better overall diver, and for me, leads …

A new Kickstarter campaign has launched for a reasonably priced and very attractive diver water – the Cult Diver Arctic Circle. Knut Gadd is a small lifestyle watch brand from Stockholm, Sweden, inspired by the founder’s grandfather, a water polo player, an Olympian and a member of the old …

JW Fishers are synonymous with underwater search equipment. You would have likely seen their adverts inside the pages of DIVER for as long one can remember. The JW Fishers HQ is located about 35 minutes south of Boston, Massachusetts. From November to March, the entire New England coast is …

The rescue of the century took place June 23, 2018 in Thailand. The lives of twelve Thai boys and their coach were saved by a group of scuba divers, throwing diving into the global limelight, and captivating the world. One of the rescue divers sat down and told us …

The rescue of the century took place June 23, 2018 in Thailand. The lives of twelve Thai boys and their coach were saved by a group of scuba divers, throwing diving into the global limelight, and captivating the world. One of the rescue divers sat down and told us …