Communication terminal device with communication controller

A portable communication terminal device which is housed in a case comprising a display unit for displaying data, and which is adapted to be worn by a user on a wrist band said sortable communication terminal device comprising:

• a position recognizer which obtains present position data;
• a display controller which controls said display unit to display the present position data obtained by said position data obtainer;
• an audio input which inputs sound information to be utilized for audio communication with an other device;
• and
• a communication controller which controls said communication terminal device to communicate with the other device using the sound information input by said audio input;
• wherein said communication controller comprises:
• a satellite communication controller which controls the audio communication with the sound information input by said audio input so that said communication terminal device communicates with the other device via communication satellites;
• and
• a ground wave communication controller which controls the audio communication with the sound information input by said audio input so that said communication terminal device communicates with the other device by ground wave communication via ground stations;
• wherein said ground wave communication controller includes an ID code receiver which receives ID codes of said ground stations;
• and
• wherein a communication selector activates said ground wave communication controller when said ID code receiver receives the ID codes from the ground stations, and activates said satellite communication controller in a case where the ID codes of the ground stations are unavailable if the communication satellite is within a limit of a communication coverage.