Rebreather

One of the most compact rebreathers around, built as a modular platform that can be dived in different configurations, not just sidemount. Scrubber and counterlung sit side by side, the breathing loop is short and loop volume small. Designed by Andrew Goring (Sump UK), produced by SmartDive in Portugal, with IDF as its training agency. As an mCCR it needs no solenoid: oxygen flows in through constant mass flow (CMF) or a needle valve, set as close to your metabolic rate as possible, and you add the rest by hand with the MAV. That means few parts and few failure points. CE certification is planned for 2027.

From Poland, designed by Andrzej Pałucha and built by Other Gravity. According to the manufacturer it carries and handles much like an aluminium 80 cu ft stage. The 2-litre oxygen cylinder sits inside the housing, the diluent is fed from outside. Type-examined to EN 14143 (CE, 2019): to 40 m on nitrox and 100 m on trimix. It is controlled via Shearwater DiveCAN. Slim and streamlined, built for caves, mines and under-ice diving.

From Sweden, on the market since 2012. The Se7en runs automated safety tests and sensor calibrations before every dive and maintains the PO₂ by itself. The head-up display and bailout valve are built into the mouthpiece. Expandable from recreational diving to trimix deco dives to 100 m (CE to EN 14143), with manual gas addition for technical dives. The battery fitted sets the depth and deco limits.