Rebreathers

From the Tip of an Iceberg to My Tap Water: Diving the Arctic Underworld and the St Lawrence River

Lasselin descends down the wall of a giant iceberg in Arctic waters. Photo courtesy of Nathalie Lasselin.

Award-winning underwater cinematographer and documentary producer Nathalie Lasselin reflects upon her dive expeditions in the Arctic and her epic project to raise awareness about the state of fresh water in the St Lawrence River, closer to home in Montreal.

Mark Caney from PADI and the RTC

RESA and RTC are in concord over training standards

Prior to this meeting the Rebreather Education and Safety Association (RESA) and the Rebreather Training Council (RTC) had been having a robust active discussion about industry-wide rebreather training standards. It seemed sensible therefore to take the opportunity for the two organisations to find a common path forward.

What exactly is meant by "Rebreather Friendly"?

“Rebreather Friendly” dive centres—what exactly does this mean? With emerging technologies becoming more mainstream in the diving world these days, more and more people are making the investment in rebreathers. Everyone knows the advantages of these pieces of kit—extended dive time capabilities, reduced gas usage, quieter and less obtrusive to the aquatic world, etc. But are dive operators thinking on the same lines?

Rebreathers and Scientific Diving Proceedings

Rebreathers and Scientific Diving - Best Practice Procedures Now Available

The meeting was first proposed by the National Park Service (NPS), then quickly supported by National Oceanic and Atmospheric Administration (NOAA), Divers Alert Network (DAN), and the American Academy of Underwater Sciences (AAUS).

A number of key experts were involved in the Catalina Island event including Jeff Bozanic, Simon Mitchell and Richard Pyle.

Over the course of four days standards relating to practice, physiology, incidents and equipment evolution relevant to scientific diving with rebreathers were reviewed.

Simon Mitchell, Neal Pollock, rebreather sorb, X-Ray, Rosemary E Lunn, Mike Young, Divetech, Innerspace, sorb duration
KISS' Mike Young filling his scrubber cannister with fresh sorb @ Divetech's Inner Space

Rebreather Sorb Research Unveiled

This information is needed because a number of divers use Spherasorb in their APD units.

APD recommend that divers should use Sofnolime 797 in their unit - the APD rebreathers are designed and tested using this sorb. However there are times when divers will use an alternative sorb due to cost, availability and / or because of perceived advantages in work of breathing or endurance.

Poseidon M28 dive computer, X-Ray Mag, Rosemary E Lunn
An M28 On A Divers Arm

Poseidon M28 Computer Update

"Due to changes in certification standards and changes in approvals of key electronics components that in turn have led to delays in the CE certification process, the expected delivery time for the first batch of M28 Computers will now be in August.

We sincerely apologize for this delay, however it is out of our hands and we are doing everything we can to keep things moving forward swiftly."

Poseidon's new Solid State Sensor (SSS)
Poseidon's new Solid State Sensor (SSS)

Poseidon Announces "Game-changing" 'Solid State Oxygen Sensor'

In early 1968 John Kanwisher and Walter Stark met by chance. They soon learned that each man had been considering the feasibility of a mixed gas closed circuit rebreather (CCRB) using electronic sensors to control the Partial Pressure of Oxygen (ppO2). They collaborated and the result was the Electrolung.