Transas Class B - Built-In Integrity Testing (BIIT); Power LED Indicator

LD2103 V3.0 Page 13 of 33
SRT Marine
Instruction Manual
SRT-MTB
©
Class B Marine AIS
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Details of relevant AIS transmissions received
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Details of AIS transmissions sent
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Details of channel management messages received
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Alarm messages generated by the BIIT function
The data port will accept the following inputs:
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Programming information
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Alarm acknowledgements
Please see the ‘Data Interface’ section of this manual for more details of the data port messages.
When in operation an AIS unit:
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Uses one of two VHF channels within the international marine band allocation (channel 87B; 161.975MHz, or channel
88B; 162.025MHz) to regularly transmit information such as the vessel position, Maritime Mobile Service Identity
(MMSI), name, speed, course, etc.
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Receives similar information from other AIS equipped vessels within VHF range and outputs that information for use by
an external display medium (AIS enabled chart plotter, PC using AIS enabled chart plotter software etc.)
Information Transmitted and Received
A Class A unit will transmit its IMO number (if known), MMSI, Call sign and Name, length and beam, ship type, time, course
over ground (COG), speed over ground (SOG), heading, navigational status, rate of turn, draught, cargo type, destination and
safety related messages via a short message service (SMS) facility. Message lengths are variable with static and voyage
related information being transmitted less often.
A Class B unit will transmit its MMSI, Call Sign and Name, length and beam, ship type, time, course over ground (COG), speed
over ground (SOG) and heading.
Built In Test
The TRANSAS AIS CLASS B- unit is equipped with Built In Integrity Testing (BIIT). BIIT tests run continuously or at appropriate
intervals simultaneously with the standard functions of the equipment. The BIIT detects any failure or malfunction that will
significantly reduce integrity or stop operation of the TRANSAS AIS CLASS B- unit.
The tests include:
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AIS TX malfunction (synthesiser not locked and TX time-out not exceeded)
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Antenna VSWR exceeds limit
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Rx channel 1 malfunction (synthesiser not locked)
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Rx channel 2 malfunction (synthesiser not locked)
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Internal GNSS not in use
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No valid SOG information
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No valid COG information
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Background noise > -77dBm
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GPS failure
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VSWR exceeding the maximum allowed level
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The input voltage is out of the specified range
LED Indicators
Power