| This device is installed for conversation by telephone among pilot house of ship (W/H), Engine Control Room, Cargo Control Room, main machinery room and Cabin. And through the artificial satellite, conversation by telephone to the outside is possible.There are auto. Telephone, Sound Powered Telphone. and Common Battery Telephone. Mainly, in normal times, people can speak by auto telephone, but in an emergency, S.P.T & C.B.T are possible. | 
