Integrated Diver Display Mask
The Integrated Diver Display Mask (IDDM) is a diving mask which contains a small basic heads-up display that lets divers monitor depth, bottom time, tank pressures, and related information while leaving their hands free for other tasks.
Oceanic / Aeris supply it. It was developed by Oceanic and the U.S. Navy. The United States military has adopted it.
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