AIS-CTRX Class B AIS Transponder Manual
USING THE TRANSPONDER
Switching on
When the 12V supply is switched on all four LEDs
visible on the front panel of the unit will illuminate
twice for a period of one second on each
illumination. The red and blue LEDs will then go
out. When the internal GPS starts outputting valid
position information and the AIS-CTRX unit
transmits its first position report (message 18) the
yellow LED will go out; Note that this process may
take up to 30 minutes depending on the switch-on
state of the GPS receiver. When the yellow LED
goes out the green LED will illuminate indicating
that the unit is now operating correctly.
S
Green (Unit operating OK)
Yellow (Warning)
Red (Fault)
Blue(Silent)
Warning and Fault States
If the unit has not been able to transmit a position report during the last expected two reporting
intervals (i.e. the nominal reporting interval cannot be maintained for operational reasons such as a
Message 23 quiet period, high channel load conditions, etc) the yellow LED will illuminate. This is a
warning condition only and indicates that your vessels position is not currently being reported to
other vessels. Reception of other vessel AIS information by the AIS-CTRX is not affected. When the
unit is able to commence reporting the yellow LED goes out.
If a fault occurs the red LED will illuminate. This may illuminate briefly if the power supply is
interrupted or if the characteristics of the VHF antenna are briefly affected.
If the Red LED illuminates continuously the unit should be assumed to be faulty and should either be
switched off (power removed) or if this is not practical any other vessel position information derived
from the unit should not be used and it should also be assumed that the unit is not transmitting valid
position information for your vessel.
The unit should be examined by a competent equipment maintainer at the earliest opportunity.
More details on LED indications can be found in the Operation section of this manual.
Data Port Messages
The data port will output the following:
• (At power-up) boot-loader and main application splash text screens including version
numbers, and memory status
• Details of relevant AIS transmissions received
• Details of AIS transmissions sent
• Details of channel management messages received
• Alarm messages generated by the BIIT function
The data port will accept the following inputs:
• Programming information
• Alarm acknowledgements
1.1E 22 LD2103
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