This code unlocks the DCIEM algorithm, intended for commercial diving, on a compatible Shearwater dive computer you already own. Shearwater's DCIEM algorithm is based on the Kidd/Stubbs serial decompression model developed by the Defence and Civil Institute of Environmental Medicine.

Shearwater lists DCIEM for the Peregrine, Peregrine TX, Perdix 2, Perdix AI, NERD 2 and Petrel 3, in single-gas air and nitrox modes only.

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Shearwater part number 10055.