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Diving Talks presents 'The Discussion Everybody Will Want to Hear'

This panel discussion will include Mark Caney, Mark Powell and Jean Claude Monachon talking about diving through the perspective of the three biggest agencies: PADI, SDI and SSI.

Mark Caney is a PADI (Professional Association of Diving Instructors) Industry Relations and Training Executive, he is President of the European Underwater Federation, President of the Rebreather Training Council and President of the World Recreational Scuba Training Council.

Mark Powell is the SDI (Scuba Diving International) Director of Global Development.

Mark Powell, International Training, ERDI, TDI, SDI, Brian Carney, Rosemary E Lunn, Roz Lunn, XRay Mag, X-Ray Magazine, scuba diving news
Instructor Trainer Mark Powell is now Director of Global Development

Mark Powell is now Director of Global Development

In 2017, Mark Powell became TDI / SDI's 'International Business' Manager. This job has recently been expanded to become a full-time role for the award-winning author, instructor trainer and 'tech-diving guru'. 

Mark Powell is uniquely qualified to help dive centers and professional members. Brian Carney

 

 

First-ever crewed dive into Atacama Trench

On 21 January 2022, two men dived the first-ever crewed dive to the deepest point of the Atacama Trench, the deepest trench in the south­eastern Pacific.

This feat saw explorer Victor Vescovo, Founder of Caladan Oceanic, and Osvaldo Ulloa from the Millennium Institute of Oceanography (IMO) de­scending to 8,069m below sea level, in the submersible Limiting Factor. This dive was the first in the Chilean leg of the Ring of Fire Pt 2 (2022) expedition.

Peace

Penning these editorials is frequently a struggle.

Coming up with new topics or pressing matters to address can often be a real challenge. Sometimes I simply do not have anything new to add to what I have already said before, and on a few occasions, I suffer plainly from writer’s block.

But this time, I have struggled for a different reason.

Seagrasses are natural carbon dioxide sink, thanks to symbiotic bacteria

Seagrasses need nutrients to thrive, particularly nitrogen (N). Up to now, it has been assumed that the nitrogen is taken up by the seagrasses through leaves and roots from the surrounding seawater and sediment. However, in many of the regions where seagrasses are most abundant, there is little nitrogen to be found.

Furthermore, while nitrogen is abundant in the sea in its elemental form (N2), seagrasses cannot use it in this form.

Large bodies helped extinct marine reptiles compensate for drag

Scientists recently announced their findings in the Communications Biology journal, stating that the creatures' large body size helped to overcome the excess drag that was created as a result. 

They discovered that while the plesiosaurs’ large necks did indeed increase the drag, this was relatively minor and was subsequently compensated for by the evolution of their large bodies.