Bringing Shipwrecks to Life

Par Becky Kagan Schott

T3/Q4 2021

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.

A Voice for the Ocean

By Abbey Dias

T3/Q4 2021

Annie Crawley and her dive team of kids and teens are among the divers who frequent the Edmonds Underwater Park marine protected area just north of Seattle, Washington, in the Puget Sound area of the Salish Sea. With drysuits on and cameras in hand, the young ocean explorers document the underwater world with Crawley as their mentor and guide. Their mission: be a voice for the ocean.

It’s All in the Name

Par Ned et Anna DeLoach

T3/Q4 2021

In 1995, when we first explored wunderpus territory, which overlies much of the Coral Triangle, the then-undescribed octopus’ fame had spread far and wide. The newly sensational creatures attained much of their acclaim for dancing like dandies across sandy seafloors on eight unimaginably limber arms — an eye-popping feat of acrobatic dexterity well worth traveling halfway around the world to see.

Le son dans le silence

Par Jim Gunderson

T3/Q4 2021

Audible cues and signals can get your buddy’s attention, signal a group of divers or indicate a problem you can help address. Even though we may dive to escape the noise of everyday life, we need to pay attention to the sounds around us. Doing so could make your dive even more special because your buddy got your attention to see something remarkable — or you may even save a life.

La photographie dans l'interface Plimsoll

Par Renee Grinnell Capozzola

T3/Q4 2021

Les photographes sous-marins appellent parfois l'étroite zone d'eau où un sujet fend la surface l'interface de Plimsoll. Cette zone offre de nombreuses possibilités de prises de vue dynamiques obtenues en orientant l'appareil photo au-dessus ou au-dessous de la ligne de flottaison. Le photographe sous-marin dévoué et créatif peut réaliser des prises de vue traditionnelles avec un ménisque droit standard et des reflets spectaculaires du sujet, de la lumière du soleil ou des deux dans le cadre d'une prise de vue modifiée ou d'une photo entièrement sous-marine.

Ne mordez pas la main qui vous nourrit

Par Gary Rose, M.D., FACS

T3/Q4 2021

Dans le cas des événements indésirables, il y a presque toujours une cascade en quatre phases : l'élément déclencheur, l'agent invalidant, la blessure invalidante et la cause du décès. Individuellement, chaque événement peut être évité. Le fait d'en reconnaître un au moment où il se produit permet de réagir et d'essayer d'atténuer le risque avant qu'il ne devienne un problème. Dans l'analyse des causes profondes des événements indésirables, les facteurs les plus importants sont la non-reconnaissance de l'événement et l'absence de réaction.

Galerie de photos de Thomas Peschak

Par Thomas Peschak

T3/Q4 2021

Air and a Spare

Par Jill Heinerth

T3/Q4 2021

No matter which alternate air source you choose, learn to calculate your air consumption and regularly practice emergency procedures. There are many ways to configure each type of redundant breathing-gas supply, but make sure your setup matches your training, gear arrangement and dive objectives. If a naysayer thinks your equipment choice is unnecessary, let them know that the difference between a fatal accident and an embarrassing incident could come down to a breath or two. Any redundancy is better than none.

The Blue Desert Conundrum

By Doug Perrine

T3/Q4 2021

Where we encounter marine megafauna, we see only a tiny slice of their habitats and lives, which rarely includes feeding. These animals may travel thousands of feet vertically or migrate a few thousand miles horizontally to meet their nutritional needs. Some of them — sperm whales, for example — must do both: descend to depths of up to a mile or more to feast on aggregations of squid and roam across large swaths of the Pacific to avoid depleting their food resources in any one area.