Side Mount Scuba Configuration

For dives deeper than 56m gas mixes called Trimix are used. In order to reduce narcosis and reduce the toxic effects of Nitrogen and Oxygen, Helium is added which has no negative effect on our body to very deep depth. There are additional risks with helium but those start at depths of around 180m. In history tests have been executed with different noble gasses, however they all turned out to be toxic for the human body, so helium was the only one adequate for diving. One other gas that has no effect on the human body is Hydrogen but due to its high risk of fire and explosion in contact with oxygen, the blending of it is very difficult if not almost impossible with the techniques we use currently.

Rebreathers allow for greater diving ability by eliminating large cylinders. Instead, they recycle the gas exhaled by divers, scrub the CO2 and inject small amounts of gas. This can greatly increase the time it takes to dive, especially if you are doing deeper dives. Rebreathers can either be sidemounted or back, and their profile is determined by the configuration.

My first courses were sidemount and technical sidemount. Sidemount diving, as the name suggests, involves placing your tank my hands and knuckles were covered in cuts by the end of the session. The idea is that you can unclip the tanks and put them out in front of you, Superman style, thus streamlining yourself. After some sizing adjustments to the harness, the afternoon dive went much more smoothly. I was now comfortably unclipping and ‘Superman-ing’ with the tanks. Compared to having doubles on your back, sidemount offers an incredible level of freedom. Matt set up obstacle courses and we were soon flying around them with tanks held out front, barrel-rolling and even swimming upside down.

You can do eLearning and coursework at home to help support local dive shops. Then, travel to complete your training dives. For a referral, contact your local PADI Dive Center.