Support & Downloads


No. The DCIEM algorithm is only available in Air and Nitrox modes with a single gas up to 40%.

DCIEM is a diving algorithm based on the Kidd/Stubbs serial decompression model developed by the Defence and Civil Institute of Environmental Medicine (DCIEM).

The DCIEM algorithm has been validated by the Defence and Civil Institute of Environmental Medicine with thousands of Doppler evaluated dives assessing the formation of bubbles which are thought to contribute to decompression sickness.

Every diver can use the DCIEM algorithm. It is the preferred diving algorithm for many commercial divers, and several Navy’s throughout the world including Canada, Australia, Italy, Norway, and many more.

$300 CAD for only an unlock code.

$250 CAD if purchased pre-installed on a Shearwater dive computer.

Bhulmann is a parallel decompression model developed by Dr. Albert Bhulmann. DCIEM is a serial decompression model developed by the Defence and Civil Institute of Environmental Medicine of Canada which has been validated with thousands of controlled manned test dives.


Yes, when you purchase an unlock code you will have access to both your Bhulmann algorithm, and your new DCIEM algorithm on the same dive computer. While you are on the surface you can switch between the Bhulmann and DCIEM algorithms. You are not able to switch between algorithms while on a dive.

The Peregrine, Perdix 2, Nerd 2 and Petrel 3 can all be used with DCIEM in single gas Air and Nitrox modes only.

Support Request


    • For repairs, please contact your nearest Repair Center listed below via email or fill out this form for RMA shipping details when shipping to Canada
    • For sales inquiries, please contact your nearest regional sales representative office.
    • For customer support inquiries, please email
    • For cloud software, bluetooth connectivity and IT support inquiries, please email

    United States Repair Center

    DIVE-Tronix, LLC
    Richard Morton
    +1 858 775 4099
    Snohomish, WA, USA

    Asia Pacific Repair Centre

    United Kingdom Repair Centre

    Narked at 90 Ltd
    +44 1933 681255
    Northamptonshire, UK

    Thailand Repair Centre

    France Repair Centre

    United States Sales

    Curt McNamee
    +1 425 418 1425
    Everett, WA, USA

    Jens Rubschlager
    Southwest Region, USA

    Paul Sheahan
    +1 704 564 3831
    Florida, USA

    Asia Pacific

    Daren Marshall
    Regional Manager APAC

    Scandinavian & Baltic Sales

    Rannva Joermundsson
    +44 7498 067388
    Cornwall, United Kingdom

    New Zealand Sales

    Canada Sales

    Simon Morris
    +1 604 669 9958
    Richmond, Canada

    UK & Ireland Sales