jotron Tron 40AIS, Руководство пользователя, Страница: 46 / 52

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When the Tron 40AIS is activated (1), the next passing satellite (2) will
detect the transmitted signal and relay it to an antenna at a LUT (3). The
signal will be routed from the LUT to an MCC (4). The MCC will then relay
the signal to the appropriate rescue coordination center (5) that will
organize the rescue operation (6).
7.9 AIS system
The EPIRB is capable of transmitting alert messages compatible with the
Automatic Identification Systems (AIS) found onboard all SOLAS vessels and
many other vessels. The transmission of these signals starts automatically
after activation of the EPIRB. A burst consisting of eight messages are
transmitted each minute with position velocity and course. These messages
are received and plotted on AIS systems. They are distinguished from other
vessels and are given special priority and alarm status. Once every 4
minutes a special text message containing the 15 HEX ID of the EPIRB and
the text “AIS SART ACTIVE” is transmitted. These messages will be displayed
immediately when received by an AIS installation.
7.10 121.5 MHz homing signal
The EPIRB transmits a sweep tone homing signal on 121.5 MHz that can be
detected by overflying airplanes and the SAR vessels.