A network communication system, in particular a ship network communication system, comprising: a signal transmission and reception apparatus configured to perform communication by inducing an electromagnetic field in a conductive object and by using the object as a communication medium, the apparatus comprising: an external communication module configured to exchange data with an external communication terminal using at least one first communication scheme of a wired communication or a wireless communication; and a magnetic field communication module configured to induce the electromagnetic field within the object and to carry the data in the induced electromagnetic field as a signal and thereby transmit the data, a counterpart device, wherein the signal transmission and reception apparatus is configured to communicate with the counterpart device, wherein the conductive object comprises a plurality of metal bulkheads that are physically separate from each other and in contact with each other, the magnetic field communication module is supplied with power and is configured to induce the electromagnetic field in the plurality of metal bulkheads and the counterpart device, and wherein the data is carried in the electromagnetic field and thereby the magnetic field communication module transmits the data, wherein the plurality of metal bulkheads comprises a first bulkhead and a second bulkhead connected to each other, the signal transmission and reception apparatus being provided on a first surface of the first bulkhead, and the counterpart device being provided on a second surface of the second bulkhead. a signal transmission and reception apparatus configured to perform communication by inducing an electromagnetic field in a conductive object and by using the object as a communication medium, the apparatus comprising: an external communication module configured to exchange data with an external communication terminal using at least one first communication scheme of a wired communication or a wireless communication; and a magnetic field communication module configured to induce the electromagnetic field within the object and to carry the data in the induced electromagnetic field as a signal and thereby transmit the data, an external communication module configured to exchange data with an external communication terminal using at least one first communication scheme of a wired communication or a wireless communication; and a magnetic field communication module configured to induce the electromagnetic field within the object and to carry the data in the induced electromagnetic field as a signal and thereby transmit the data, a counterpart device, wherein the signal transmission and reception apparatus is configured to communicate with the counterpart device, wherein the conductive object comprises a plurality of metal bulkheads that are physically separate from each other and in contact with each other, the magnetic field communication module is supplied with power and is configured to induce the electromagnetic field in the plurality of metal bulkheads and the counterpart device, and wherein the data is carried in the electromagnetic field and thereby the magnetic field communication module transmits the data, wherein the plurality of metal bulkheads comprises a first bulkhead and a second bulkhead connected to each other, the signal transmission and reception apparatus being provided on a first surface of the first bulkhead, and the counterpart device being provided on a second surface of the second bulkhead.