Tools for CCR Rebreather divers to calculate the optimal gas mix and gas blending application for nitrox, trimix and heliair. Imperial and metric units.To support the development same app as CCR Mixer.The CCR Mixer functions:Best MixMixing - HeliAirMixing - Nitrox (EANx)Mixing - Trimix (Tx) Mixing - Top upMixing - What ifMaximum Operating Depth (MOD)Equivalent air depth (EAD)Equivalent narcotic (END)CNS % / OTU Table