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This program is designed to train divers to conduct dives to depths between 30 msw (100 fsw) and a maximum depth of 51 msw (170 fsw) using and EANx mixture, to provide greater understanding of custom blend breathing gas mixtures, a complete knowledge of the limits of any EANx mixture and the use of EANx and oxygen for decompression. The course covers a broad level of theory and skills, focusing on the bailout procedures needed to conduct extended range dives. A major emphasis on the theory is dive planning for all failure scenarios. The course develops the core survival skills such as isolation manifold shutdowns to a higher level of performance, giving the diver increased confidence to conduct extended range dives. The knowledge and skills taught in this program qualifies divers to safely conduct dives to 51 msw (170 fsw) and perform decompression stops using EANx or oxygen.