Improved Dolphin ready to roll – at lastIt seems a very long time since the Dräger semi-closed circuit rebreather (SCR) was introduced to the leisure-diving market. You choose a suitable nitrox mix, with regard to maximum operating depth (MOD), and a gas supply port to match. Though the MOD depends on the nitrox mix in the tank, the decompression required has to be calculated from the mix actually breathed in the breathing circuit. Use the new three-mix Suunto Vytec, of course! The Suunto Vytec represents the ultimate in diving-computer technology achieved by this high-tech Finnish company to date.