UNDERWATER COMMUNICATION SYSTEM
[Problem] To provide an underwater communication system the purpose of which is underwater activity and for which there are no holes in an outer shell of a sealed structural body. [Solution] In the present invention the following are provided: a sealed structural body (2) having an outer shell (5) of a watertight structure to be disposed underwater
a transmission means (9) disposed inside of the sealed structural body (2) and capable of wireless transmission
a non-conductive transfer medium (4) one end of which is in contact with the outside of the outer shell (5) of the watertight structure, without making a hole in such outer shell
and a reception means (10) that wirelessly transmits an electric signal from the transmission means (9), and receives the electric signal from the other end of the transfer medium (4) that is far from the outer shell (5).