Safety Culture

Avoiding Bad Gas - Tips for Preventing Breathing-Gas Contamination

Sources of contamination include hydrocarbons from compressor lubricants, carbon monoxide (CO) from engine exhaust (or overheated compressor oil) and impurities from the surrounding environment such as methane and carbon dioxide (CO2). Dust particles in breathing gas can also be hazardous, potentially impairing respiratory function or damaging diving equipment. Excessive moisture can cause corrosion in scuba cylinders and other dive gear and may cause regulators to freeze due to adiabatic cooling (heat loss following increased gas volume).

Rebreather Checklist, Divetech's Inner space, PADI TecRec
A diver checking his rebreather during Divetech's Inner Space. Note the checklist on top of his unit

Rebreather Checklists!

Throughout Rebreather Forum 3 experts from all fields - manufacturing, human interface design, accident analysis, rebreather training and diving - all advocated the use of checklists. The benefits of using this tool were highlighted to ensure that units are correctly built and pre-dive checks completed.

Just Culture

Debriefing allows lessons to be learned—successes and failures. Photo by Gareth Lock.

A diver had an oxygen toxicity seizure because an incorrect gas was filled in a cylinder by a dive centre. A baby died because the wrong dose of medication was injected. Who is to blame for the error and how do we try to make sure that these types of incidents aren’t repeated?

Why you should never go diving with an idiot

Being swept along on this technical diving thing, has been a long, somewhat twisted, but definitely entertaining journey. If you and I had met when the whole affair started, we could not possibly have envisioned how directly and pervasively, what were then radical activities, like cave diving, trimix diving and rebreather diving, would influence the mainstream dive community.

Exposure—How Long, How Deep, How Cozy?

The Royal Mail Ship, Empress of Ireland, was an ocean-going luxury liner on her way to Liverpool from Quebec City when she sank in the Saint Lawrence River, 14 minutes after colliding with a Norwegian collier in the early morning fog of 29 May 1914. She had 1,477 people on board—passengers and crew—and the accident claimed the lives of 1,012, more than 800 of them passengers.