Abstract: The present invention relates to an interphone device for use in ships, the interphone device comprising: an input/output unit to which a voice is input or from which a voice is output; a transmission/reception circuit unit which receives the voice from the input/output unit and provides a first signal obtained by encoding and modulating the received voice; and an antenna which is attached to the metal hull of the ship, forms an electromagnetic field in the metal hull, and carries the first signal received from the transmission/reception circuit unit by the electromagnetic field, so as to propagate the first signal.

Abstract: A camera apparatus includes a camera module configured to generate an input image, and a transceiving circuit configured to encode and modulate the input image and to provide an electric and/or magnetic first signal. Also, the camera apparatus includes an antenna attached to a metal body of a vehicle and configured to form an electromagnetic field on the metal body and to propagate the first signal received from the transceiving circuit by carrying the first signal in the electromagnetic field.