room houses the KAESER SX 3 compressor, refrigeration dryer, air receiver and filter combination for breathing air and there is also space for the divers to make ready. The air generated is suffi- cient for two divers down to a depth of 50 metres. The second room is for the operation controller who is in continuous visual and audio contact with the divers via microphone, video camera and lights built into their diving helmets. A video recorder ca

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