Tools for CCR Rebreather divers to calculate the optimal gas mix and gas blending application for Nitrox, Trimix and Heliair. Imperial and metric units. Functions: - Optimal CCR Mix (Best Mix, OC Bailout) - Mixing HeliAir - Mixing Nitrox (EANx) - Mixing Trimix (Tx) - Mixing Top up - Mixing What if - MOD/END/EAD/EADD - CNS%/OTU Table