| 摘要 |
PURPOSE: An underwater communication device is provided to install a microphone and a speaker capable of communication in an underwater mask and communicate with a maritime radio by wire through a line added in an air supply hose. CONSTITUTION: A microphone(105) and a speaker(104) capable of transmission and reception are embedded in a mask(60). The microphone(105) and the speaker(104) connect to a transmitter(5) and a receiver(4) of the first radio(100) through a connection jack(120) by a line(130) added in an injection tube. A wireless call is performed with an other radio in the water through the first radio(100).
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