| 摘要 |
<p>The device has a transmitter (3') transmitting data e.g. actual ship positions, which are received by a transmitter/receiver system (2) i.e. automatic identification system, of an object (1''). The data contain information about a position, a moving direction, a speed and an identifier of another object (1'), where the information includes a status indicator displaying unauthorized use of the latter object. The information are integrated in the data when an identification mechanism is not activated. The transmitter and/or a receiver (3'') is operable in a frequency of 117.975 MHz to 137 MHz.</p> |
