New Zealand’s Gas Cylinder Regulations: Hot Air?
By Franz Ombler. Image by Sami Paakkarinen Apparently we can’t use gas mixes with helium, or with oxygen content less than 21% or higher than 40%. Many of …
Advanced Knowledge Series: Are All Carbon Dioxide Absorbents the same?
By Associate Professor Simon Mitchell, University of Auckland. Introduction and recap This is the fifth in a series of articles appearing in Dive New Zealand …
Dry (and Stealthy HECS) Winter Diving
By Dave Abbott. Images by Dave Abbott unless otherwise credited. (Cover image as well as above image by Sophie Roselt.) Not everyone can afford to head off …
Lessons in Luck
By Richard Taylor. Let’s be honest, diving has had a bit of a bad rap lately. We can’t really complain – after all, the recent number of fatalities …
Simple is Good, Complex is Dumb
By Tony Howell. I have known since my first days as a diver that people under stress or fighting panic tend to make wrong choices. In an emergency, divers need …
Advanced Knowledge Series: The Five-minute Prebreathe
By Associate Professor Simon Mitchell, University of Auckland. Introduction and recap This is the third in a series of articles appearing in Dive New …
Learning to Dive a Closed Circuit Rebreather
By Tony Howell Images by Walt Stern It was a very exciting day when I took possession of my first CCR. I had been diving scuba since 1972 and had a …
Technical Aspects of Conducting a Decompression Dive
of deep decompression dives is really important, to avoid potential life threatening problems. The best way to explain a dive plan is to take you through an …
Defence Divers
By Dave Moran ‘Walking!’ ‘Walking? – Just like normal people walking?”Yes’ came back the reply from the four smiling Navy …
Bailing out – yes but how?
A bailout tank must be streamlined and easy to remove. In case of rescue, a bailout valve is an easy way to go on open circuit. Golem Gear Bailout valve: easy …