It’s been more than a year since many divers have traveled internationally and visited beloved or new dive destinations. Although it is unclear when and which international destinations will be fully accessible, it’s important to stay proactive about important travel documentation preparation.
Photogrammetry is the process of collecting a series of still images or videos of an object, such as a shipwreck, and then loading those images into software that can triangulate the photographed points to create a 3D model. Plenty of real-world applications can use this technology, including architecture, engineering, forensics, archaeology, mapping and video games. Becky Kagan Schott enjoys seeing wrecks come to life in a way that a single photo could never accomplish.
On ne saurait trop insister sur les avantages de la protection des herbiers marins. Les herbiers marins purifient l'eau, contribuent à la protection contre l'érosion côtière, aident à maintenir les pêcheries à petite échelle qui soutiennent les communautés, et augmentent les populations de poissons et la biodiversité. Elle séquestre beaucoup plus de carbone par surface que les forêts terrestres et réduit l'acidification des océans. Des herbiers marins en bonne santé sont synonymes d'un océan plus sain.
In her work, Rachel Lance, Ph.D., focuses on extreme environments, particularly the effects of explosions. “The human body is fascinating, especially when it fails,” she says. “We are not naturally equipped to survive in a deep underwater environment, so I am fascinated with the idea of finding ways to do so anyway. Perhaps it’s my naturally rebellious side.”
Known for their striking colors, patterns and forms, nudibranchs are found in seas all over the world. Sculptor Gar Waterman’s fascination with these sea slugs extends beyond his aesthetic appreciation for their unique, organic form. Because most nudibranchs have a life span of less than a year and adapt rapidly to changes in their environment, they help scientists understand the impact of global warming on ocean health. With each nudibranch that he has cut, chiseled and polished from stone, Waterman hopes to communicate their quirky beauty and scientific role.
My buddy and I ascended to 20 feet for our safety stop. As soon as we surfaced I thought I saw the boat moving away from me but quickly realized I was disoriented. It felt like vertigo, but I managed to get on board the boat. I removed my gear and was talking to my buddy when I started involuntarily leaning forward until I lost my balance and collapsed face-down on the deck. I felt paralyzed and couldn’t get up.
Octopuses hole up in small dens, are quite excellent at camouflage and are most active at night, so not all divers have seen one on a dive. But biologist Matthew Birk, who studies octopuses, felt that never having seen one in the wild was a blemish on his career and sought to remedy the situation on a trip to Santa Catalina Island off Southern California.
Si le plongeur présente des symptômes et que vous lui prodiguez des soins, vous devez traiter les symptômes. Administrez-lui la plus forte concentration d'oxygène disponible et amenez-le à un centre de soins et de traitement définitif. Rappelez-vous que de nombreuses pathologies présentent des symptômes qui peuvent imiter le SCD. Ce n'est pas parce qu'une personne a plongé qu'elle souffre d'une maladie liée à la plongée. Lors de l'élaboration de votre plan d'action d'urgence, notez l'emplacement de la salle d'urgence la plus proche ou le lieu et la manière d'accéder aux services d'urgence locaux.
Swimming is a noncontact physical activity that lets you be socially distant while still receiving many health benefits. Exercising in water can increase cardiac function, reduce blood pressure and improve muscle blood flow, respiratory function and brain function. Water reduces joint impact, so you can do high-intensity exercise with little to no discomfort from impact. Swimming targets your entire body and allows a greater range of motion for joints than land-based exercise. Blood flows more freely to your upper body, while the water supports you and lowers gravity’s impact.
En plus de me permettre d'éviter le réveil au lever du soleil, la plongée sur le rivage offre d'autres libertés : le choix d'un site de plongée à la dernière minute, la possibilité d'effectuer une plongée de deux heures sans inquiéter l'équipage du bateau et la liberté d'ajouter une plongée à ma journée si les conditions le permettent. De plus, la plongée sur la plage peut s'avérer très économique par rapport à la plongée en bateau. De plus, certains des sites les plus incroyables au monde sont plus facilement accessibles depuis la plage.
