Blue Dragons
Equipment: Sony a7RV camera, Sony 28-60mm lens at 49mm, a Nauticam WACP-C wide-angle conversion port, Nauticam housing, Retra Pro X strobesSettings: 1/250 sec, f/22, ISO 400Location: Sea of Cortez, Baja California […]
Alert Diver Issue : Q1 2025
Homemade Dive Gear
The “Historic Dive Helmets” article from the Second Quarter 2024 issue of Alert Diver triggered memories of my father, Burton Stewart, and his best friend Leno Prestini. In 1935 they crafted their […]
Used Rebreather Scrubber Disposal
Sorb, or scrubber, plays a critical role in rebreather diving, as it is responsible for removing carbon dioxide (CO2) from the diver’s breathing gas. Small granules or pellets absorb exhaled […]
Rewilding Coral Reefs
Rewilding is a popular term in conservation circles, but what does it mean, and is it appropriate for coral reefs? Should divers be clamoring for reef rewilding? Does it represent […]
Photographie grand-angle en mise au point rapprochée
Most of our experiences in digital photography are somewhere between one end of a spectrum and the other. Underwater photographers often make an either/or distinction when describing how we shoot, […]
No Plan B
Van Morrison dropped his 34th album, Born to Sing: No Plan B, in 2012. David Fleetham, now 48 years into his career as a professional underwater photographer, reflects on that […]
Diving After a Nissen Fundoplication
I am a 57-year-old male who is planning to undergo a laparoscopic Nissen fundoplication for refractory gastroesophageal reflux disease (GERD) and a hiatal hernia. Is the procedure considered an absolute […]
La plongée dans les zones isolées
La plongée comporte des risques inhérents. Le corps humain n’est pas fait pour évoluer sous l’eau, et des situations telles que la noyade, les maladies de décompression, les barotraumatismes, les blessures causées par la faune marine dangereuse ou encore des problèmes de santé préexistants exigent toutes une réponse d’urgence. Plonger dans des zones isolées implique des risques supplémentaires, notamment l’accès limité aux soins médicaux.
A Tourniquet Saves a Diver’s Life
A recent dive trip changed the lives of everyone involved, and I hope this story might help save another life. About 30 days before the trip, I was talking to […]
A Critical Look at No-Decompression Limits
As a hyperbaric physician and dive instructor, I’ve been around a lot of dive accidents, and I’ve spent decades educating divers and treating decompression sickness (DCS).
