Unfortunately you need infrared-based hardware to unload dives from the
Leonardo. Subsurface does not provide any hardware. You will notice that
the Cressi software also does not work without the infrared hardware
interface. Tough choice when buying a new dive computer because the
upload hardware is usually extortionately expensive. Newer dive
computers have built-in bluetooth but even then (e.g. Shearwater) you
may need a special bluetooth dongle.
Kind regards,
willem
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