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LD2103 V3.4 Page 2 of 33 SRT Marine Technology Ltd Instruction Manual SRT-MTB Class B Marine AIS Table of contents Table of contents ............................................................................................................................................................................2 General Warnings .....................................................................................................................................................................4 FCC Compliance ...
LD2103 V3.4 Page 3 of 33 SRT Marine Technology Ltd Instruction Manual SRT-MTB Class B Marine AIS Power up messages .................................................................................................................................................................19 VHF data link messages (NMEA 0183 VDM) ...........................................................................................................................19 VHF data link own vessel messages (NMEA 0183 VDO) ................
LD2103 V3.4 Page 4 of 33 SRT Marine Technology Ltd Instruction Manual SRT-MTB Class B Marine AIS General Warnings All marine Automatic Identification System (AIS) units utilise a satellite based system such as the Global Positioning Satellite (GPS) network or the Global Navigation Satellite System (GLONASS) network to determine position.
LD2103 V3.4 Page 5 of 33 SRT Marine Technology Ltd Instruction Manual SRT-MTB Class B Marine AIS RF Emissions Notice Caution: The SRT-MTB Class B AIS transponder generates and radiates radio frequency electromagnetic energy. This equipment must be installed and operated according to the instructions contained in this handbook. Failure to do so can result in personal injury and / or product malfunction. Caution: Never operate the transponder unless it is connected to a VHF antenna.
LD2103 V3.4 Page 6 of 33 SRT Marine Technology Ltd Instruction Manual SRT-MTB Class B Marine AIS Static Data Entry WARNING: It is a violation of the rules of the Federal Communications Comission to input an MMSI that has not been properly assigned to the end user, or to otherwise input any inaccurate data into this device.
LD2103 V3.4 Page 7 of 33 SRT Marine Technology Ltd Instruction Manual SRT-MTB Class B Marine AIS Product Specification Parameter Value Dimensions 190 x 135 x 83 mm (L x W x H) Weight 1450g Power DC (10.8 - 15.6V) Average power consumption 4W Peak current rating 2A GPS Receiver (AIS Internal) IEC 61108-1 compliant Electrical Interfaces RS232 38.4kBaud bi-directional RS422 NMEA 38.
LD2103 V3.4 Page 8 of 33 SRT Marine Technology Ltd Instruction Manual SRT-MTB Class B Marine AIS Standards This product complies to all the necessary standards under the European R&TTE directive for Article 3.1(a), 3.1(b), 3.2 and 3.3(e).
LD2103 V3.4 Page 9 of 33 SRT Marine Technology Ltd Instruction Manual SRT-MTB Class B Marine AIS Introduction How AIS Works The marine Automatic Identification System (AIS) is a location and vessel information reporting system. It allows vessels equipped with AIS to automatically and dynamically share and regularly update their position, speed, course and other information such as vessel identity with similarly equipped craft.
LD2103 V3.4 Page 10 of 33 SRT Marine Technology Ltd Instruction Manual SRT-MTB Class B Marine AIS AIS Classes There are two classes of AIS unit fitted to vessels, Class A and Class B. In addition AIS base stations may be employed by the Coastguard, port authorities and other authorised bodies. AIS units acting as aids to navigation (A to Ns) can also be fitted to fixed and floating navigation markers such as channel markers and buoys.
LD2103 V3.4 Page 11 of 33 SRT Marine Technology Ltd Instruction Manual SRT-MTB Class B Marine AIS Installing the SRT-MTB unit WARNING: Do not connect the SRT-MTB unit to a mains (line) AC electrical supply, as an electric shock or fire hazard could result. CAUTION: Do not connect the SRT-MTB unit to a DC supply exceeding 15.6 V or reverse the supply polarity. Damage to the unit may result. CAUTION: The SRT-MTB unit is designed for operation in the temperature range -25 °C to +55 °C.
LD2103 V3.4 Page 12 of 33 SRT Marine Technology Ltd Instruction Manual SRT-MTB Class B Marine AIS If an external display unit is to be used (such as a chart plotter, PC serial terminal or other display device) connect the user end of the data interface cable to the display device. Note that the software in the display device must be configured for AIS operation AND to accept standard Class B operation NMEA sentences. This external display unit software is not part of the SRT-MTB transponder package.
LD2103 V3.4 Page 13 of 33 SRT Marine Technology Ltd Instruction Manual SRT-MTB Class B Marine AIS Programming the transponder Before the SRT-MTB can be used as a transponder it requires configuration with vessel data. This configuration will be carried out by the vendor of the transponder using data for your vessel.
LD2103 V3.4 Page 14 of 33 SRT Marine Technology Ltd Instruction Manual SRT-MTB Class B Marine AIS Using the transponder Switching on S 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.
LD2103 V3.4 Page 15 of 33 SRT Marine Technology Ltd Instruction Manual SRT-MTB Class B Marine AIS 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.
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LD2103 V3.4 Page 17 of 33 SRT Marine Technology Ltd Instruction Manual SRT-MTB Class B Marine AIS Status This is a blue LED which either indicates that a Safety Related Message has been transmitted or that the unit is in "Silent mode". The condition indicated by the blue LED is determined during configuration of the unit by the switch option selected. Please refer to the "Switch functions" section of this manual for more detail.
LD2103 V3.4 Page 18 of 33 SRT Marine Technology Ltd Instruction Manual SRT-MTB Class B Marine AIS Serial Data Interface Power Connection / Data Connection There is a 15-way D-type male connector mounted under the transponder top cover. The standard data or power and data cable assembly provided mates with this connector. Power 12V DC (9.6-15.6V) is connected to the transponder power supply input via the cable assembly LD1873.
LD2103 V3.4 Page 19 of 33 SRT Marine Technology Ltd Instruction Manual SRT-MTB Class B Marine AIS Power up messages On power up the unit will report details of the firmware versions residing in the unit. VHF data link messages (NMEA 0183 VDM) Receipt of a VHF Data Link (VDL) message on either AIS radio channel causes a VDM message to be output via the data port. Please see IEC 61193-2, Annex B for a list of messages.
LD2103 V3.4 Page 20 of 33 SRT Marine Technology Ltd Instruction Manual SRT-MTB Class B Marine AIS VDL Message number VDM Message description 13 safety related ack (INFO) 15 interrogation (INFO) 17 DGNSS corrections (INFO) 20 data link management (INFO) 22 channel management (INFO) 23 Group assignment (INFO) *Note that messages 5 and 19 may be sent as multi part messages. VHF data link own vessel messages (NMEA 0183 VDO) This message describes the own vessel message being sent.
LD2103 V3.4 Page 21 of 33 SRT Marine Technology Ltd Instruction Manual SRT-MTB Class B Marine AIS Regional Assignment Channel Assignment Message (NMEA 0183 ACA) An SRT-MTB unit can receive regional channel management information in two ways: ITU-R M.1371 message 22 or a DSC telecommand received on channel 70, ACA Message Format $--ACA,x,llll.ll,a,yyyyy.yy,a,llll.ll,a1,y1y1y1y1y.y1y1,a2,x1,x2x2x2x2,x3,x4x4x4x4,x5,x6,x7,a3,x8,hhmmss.
LD2103 V3.4 Page 22 of 33 SRT Marine Technology Ltd Instruction Manual SRT-MTB Class B Marine AIS • xxxx = UTC Year AIS Alarm Messages (NMEA 0183 ALR, Text) ALR message format $--ALR,hhmmss.ss,xxx,A,A,c--c*hh Where • hhmmss.
LD2103 V3.4 Page 23 of 33 SRT Marine Technology Ltd Instruction Manual SRT-MTB Class B Marine AIS Antenna connections GPS Antenna This is a TNC female bulkhead connector mounted under the unit top cover. This port provides the 5V DC feed for the active GPS antenna required by the SRT-MTB unit. VHF Antenna This is a BNC female bulkhead connector mounted under the unit top cover. Antenna types and mounting Please see Appendix A for antenna details.
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LD2103 V3.4 Page 25 of 33 SRT Marine Technology Ltd Instruction Manual SRT-MTB Class B Marine AIS Fixing Template (NOT TO SCALE) REVISION HISTORY REV DESCRIPTION DATE APPROVED MOUNTING HOLES IN BASE PLATE ARE O5.5 TO SUITM5 SCREWS 100,0 MOUNTING HOLE FIXING CENTRES TEMPLATE FRONTOF UNIT 160,0 NAME DATE M.KENDALL 24/2/06 DRAWN CHECKED SOFTWARE RADIO TECHNOLOGY PLC WESTFIELD INDUSTRIAL ESTATE MIDSOMER NORTON, BATH, UK.
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LD2103 V3.4 Page 31 of 33 SRT Marine Technology Ltd Instruction Manual SRT-MTB Class B Marine AIS Appendix A Antennas and Antenna Mounting GPS Antenna The GPS antenna used must be of the active type (i.e. it should incorporate an LNA) and must be suitable for marine shipboard applications (index of protection, ruggedness, means of mounting, etc.).
LD2103 V3.4 Page 32 of 33 SRT Marine Technology Ltd Instruction Manual SRT-MTB Class B Marine AIS Warnings VHF Antenna Connection Connecting a badly mismatched VHF antenna, leaving the VHF antenna port disconnected, or shorting the VHF antenna port will activate the VSWR alarm, cause the unit to stop sending position reports or cause damage to the transponder.
LD2103 V3.4 Page 33 of 33 SRT Marine Technology Ltd Instruction Manual SRT-MTB Class B Marine AIS SRT Marine Technology Ltd is at the forefront of technology innovation and for this reason, reserves the right to alter, without notice, the specification, design or conditions of supply of any product of service. Information provided by SRT Marine Technology is believed to be accurate and reliable.
