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LD2103 V3.0 Page 4 of 33 

SRT Marine 

 

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.  

The accuracy of these networks is variable and is affected by factors such as the antenna positioning, how many satellites are 
used to determine a position and how long satellite information has been received for. 

It is desirable wherever possible therefore to verify both your vessels AIS derived position data and other vessels AIS derived 
position data with visual or radar based observations. 

The compass safe distance of this unit is 0.5m or greater for 0.3° deviation. 

In  accordance  with  a  policy  of  continual  development  and  product  improvement  the  TRANSAS  AIS  CLASS  B  hardware  and 
software may be upgraded from time to time and future versions of the TRANSAS AIS CLASS B may therefore not correspond 
exactly with this manual. 

When necessary upgrades to the product will be accompanied by updates or addenda to this manual. 

Please take time to read this manual carefully and to understand its contents fully so that you can install and operate your AIS 
system correctly. 

Information contained in this manual is liable to change without notice. 

Transas  Ltd.  disclaims  any  liability  for  consequences  arising  from  omissions  or  inaccuracies  in  this  manual  and  any  other 
documentation provided with this product. 

© 2007 Transas Ltd. 

 

FCC Compliance 

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the 
FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. 
This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the 
instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not 
occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be 
determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the 
following measures: 

 

Reorient or relocate the receiving antenna. 

 

Increase the separation between the equipment and receiver. 

 

Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. 

 

Consult the dealer or an experienced radio/TV technician for help. 

 
The TRANSAS AIS CLASS B- does not contain any user serviceable parts. Repairs should only be made by an authorized 
TRANSAS service agent. Unauthorised repairs or modifications could result in permanent damage to the equipment and void 
your warranty and you’re authority to operate this equipment under Part 15 regulations. 
 

 

 

 

RF Emissions Notice 

Caution: The TRANSAS AIS CLASS B 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. 
 

To maximise performance and minimise human exposure to radio frequency electromagnetic energy you must make sure that 
the antenna is mounted at least 1.5 meters away from the transponder and is connected to the transponder before power is 

Summary of Contents for Class B

Page 1: ...LD2103 V3 0 Page 1 of 33 SRT Marine User Manual Transas Class B Transponder V1 0...

Page 2: ...the transponder 11 Programming software 11 Configuration 11 Using the transponder 12 Switching on 12 Switch functions 12 Warning and fault states 12 Data port messages 12 Information Transmitted and...

Page 3: ...l SRT MTB Class B Marine AIS Antenna connections 21 GPS Antenna 21 VHF Antenna 21 Antenna types and mounting 21 Drawings 22 Packing list 22 Glossary 29 Appendix A 31 Antennas and Antenna Mounting 31 G...

Page 4: ...FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy an...

Page 5: ...conjunction with any other transmitting antenna This device has been designed to operate with standard marine VHF antennas having a maximum gain of 3dBi Antennas not included in this list or having a...

Page 6: ...des 25kHz GMSK AIS TX and RX 25kHz AFSK DSC RX only Bit rate 9600 b s 50 ppm GMSK 1200 b s 30 ppm FSK RX Sensitivity Sensitivity 107dBm 25kHz Message Error Rate 20 Co channel 10dB Adjacent channel 70d...

Page 7: ...nd Radio spectrum Matters ERM Electromagnetic Compatibility EMC standard for marine radio equipment and services Part 1 Common technical requirements EN 50383 2002 Basic standard for calculation and m...

Page 8: ...o 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 nav...

Page 9: ...a to the VHF antenna port and connect the down lead of a GPS antenna to the GPS antenna port Please see Appendix A for recommendations on antennas and antenna installation If an external display unit...

Page 10: ...SRT MTB Class B Marine AIS unit is not attached to metal parts of the vessel Physical Mounting It is recommended that the unit is attached to a solid wooden surface with 20mm M3 self tapping screws A...

Page 11: ...ftware is designed to be installed on a PC and to use the data lead provided as standard with the TRANSAS AIS CLASS B unit If the PC being used for programming does not have a 9 pin serial port then a...

Page 12: ...onfigured to place the unit into Silent mode each press of the switch will toggle the AIS transmitter on or off The switch must be depressed for two seconds to change the state of the transmitter When...

Page 13: ...n 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 m...

Page 14: ...ng The transponder s internal GPS receiver is not operating or is not yet ready 1 requires that a class B CSTMA transponder shall not transmit if its internal position sensor is not operating The tran...

Page 15: ...illuminated TIMEOUT ERROR STATUS POWER Silent mode is indicated by both the yellow and blue LEDs being illuminated TIMEOUT ERROR STATUS POWER Antennas The TRANSAS AIS CLASS B unit requires VHF and GPS...

Page 16: ...DM VDO ACA ACS ALR TXT and ACK messages conform to NMEA 0183 Please refer to NMEA 0183 for full details of these AIS messages Serial Port Input Output There are two serial ports one presenting RS422 f...

Page 17: ...ulated ITU R M 1371 radio message x Number of fill bits 0 to 5 VDM Message Types For example the information contained in the s s portion of the VDM Encapsulated ITU R M 1371 radio message Note that m...

Page 18: ...Information 13 Safety Related Acknowledgement 18 Standard Class B position report Includes MMSI SOG position accuracy lat long COG true heading 24a Class B CS Static data Part A Includes MMSI and vess...

Page 19: ...hhmmss ss xx xx xxxx hh CR LF x Sequence Number 0 to 9 xxxxxxxxx MMSI of originator hhmmss ss UTC of receipt of channel management information xx UTC Day 01 31 xx UTC Month 01 12 xxxx UTC Year AIS Al...

Page 20: ...erface integrity AIS Background noise above 77dBm ACK messages Can be generated by a minimum keypad and display MKD unit chart plotter or other display device connected to the TRANSAS AIS CLASS B to a...

Page 21: ...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 TRANSAS AIS CLASS B unit VHF Antenna This is a BNC female...

Page 22: ...WING 1 NA NOTAP PLICABLE 9 LD2110 INS T ALLAT ION DIAGRAM 1 1 2 3 5 5 4 6 7 8 9 10 11 LD2121 POWERCABLEASS EMBLY KIT3 0 5m LONG 1 12 LD2134 MOUNT ING S CREWKIT 1 11 12 2 MAGNETP ACKREMOVED 15 6 06 DRA...

Page 23: ...0 0 160 0 DRAWN CHECKED NAME M KENDALL DAT E T IT LE S IZE A4 DWG NO RE V FILENAME LD2104 2 dft S CALE S HEET1 OF 1 REVIS ION HIST ORY REV DESCRIPT ION DAT E APPROVED S OFT WARERADIO T ECHNOLOGYP LC W...

Page 24: ...ECI FI E D DIMENS IONSAREINM ILL IMET E RS ANGLES 0 5 0 0 0 2 0 00 0 1 NAME M KEND A LL DA T E 06 15 06 TI TLE SI ZE A1 DWG N O REV F IL E N A M E L D 2 111 2 d ft S C A L E S HEE T1 OF1 RE VI SI O N...

Page 25: ...8 NA NOT APPLICABLE 24 REFERT O NOT E 25 THIS DRAWING SHOWS TWO BUILD VARIANTS 1 FITTED WITH MEMBRANE ALERT SWITCH PANEL USE ITEM 24 2 NO ALERT SWITCH FITTED USE ITEM 25 COMPONENTSNOTS HOWN REFERT O N...

Page 26: ...LD2103 V3 0 Page 26 of 33 SRT Marine Instruction Manual SRT MTB Class B Marine AIS Cable Assemblies POWER CABLE ASSEMBLY LD 2109...

Page 27: ...LD2103 V3 0 Page 27 of 33 SRT Marine Instruction Manual SRT MTB Class B Marine AIS CLASS B TRANSPONDER VHF EXTERNAL CABLE LD 2131...

Page 28: ...LD2103 V3 0 Page 28 of 33 SRT Marine Instruction Manual SRT MTB Class B Marine AIS POWER AND DATA CABLE ASSEMBLY LD 2122 BLACK RED...

Page 29: ...C Direct Current DGNSS Differential Global Navigation Satellite System DSC Digital Selective calling GLONASS Global Navigation Satellite System GNSS Global Navigation Satellite System GMSK Gaussian Mi...

Page 30: ...on Rate SMS Short Message System SOG Speed over Ground SRM Safety Related Message TDMA Time division Multiple Access TNC Threaded type BNC connector TX Transmit or transmitter UTC Universal Time Co or...

Page 31: ...through 360 degrees with a vertical angle of 5 to 90 degrees above the horizon As the received GPS signal is very sensitive to noise and interference generated by other onboard transmitters ensure th...

Page 32: ...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 Radio Frequency Exposure...

Page 33: ...LD2103 V3 0 Page 33 of 33 SRT Marine Instruction Manual SRT MTB Class B Marine AIS...

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