Diving Mask, Full Face 04
Diving Mask, Full Face 04 : Features: (3) Full Face Mask Configurations: (3. 1) Without A Mouthpiece Inside The Full-Face Mask: Here, the diver can talk clearly without removing his mouthpiece, including talking with other divers underwater. This allows communications equipment (usually an intercom wire or by modulated ultrasound) to be installed in the mask and is very useful for working divers. If a full-face mask floods underwater, it can be more difficult to clear it, than with a mouthpiece. There also is the problem of "dead space" inside the mask causing risk of carbon dioxide retention
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