
5.5 Message types ............................................................................................................ 40
6. MAINTENANCE ............................................................................................................ 45
6.1 General ....................................................................................................................... 45
6.2 Periodic maintenance ................................................................................................. 45
6.2.1 MKD Units................................................................................................... 45
6.2.2 Mobile Unit.................................................................................................. 45
6.3 Repair and modifications ........................................................................................... 46
6.3.1 Exchanging antenna cables.......................................................................... 46
6.3.2 Exchanging GPS or VHF antennas.............................................................. 46
6.4 Software updates ........................................................................................................ 47
6.4.1 Manual update.............................................................................................. 47
6.4.2 Update using FTP ........................................................................................ 47
7. TROUBLESHOOTING ................................................................................................. 49
7.1 General ....................................................................................................................... 49
7.2 Hardware problems .................................................................................................... 49
7.2.1 Power supply failure .................................................................................... 50
7.2.2 GPS and VHF antenna cable connections ................................................... 50
7.2.3 GPS and VHF antenna malfunction............................................................. 50
7.2.4 GPS receiver failure..................................................................................... 50
7.2.5 VHF transceiver failure ............................................................................... 51
7.3 External data interface problems................................................................................ 51
7.3.1 Data input from main GPS/GNSS source.................................................... 51
7.3.2 Heading from vessel heading sensor ........................................................... 51
7.3.3 AIS unit restarts ........................................................................................... 52
8. SPARE PART LIST........................................................................................................ 53
9. APPENDIX A - VESSEL IDENTIFIERS..................................................................... 55
10. APPENDIX B - DIGITAL INTERFACE IEC 61162-1............................................... 59
10.1 Hardware.................................................................................................................... 59
10.2 Proprietary 61162-1 sentences................................................................................... 60
10.2.1 General......................................................................................................... 60
10.2.2 MSI number ................................................................................................. 60
10.2.3 IMO number................................................................................................. 61
10.2.4 Serial port communication parameters ........................................................ 61
10.3 New IEC 61162-1 sentences ...................................................................................... 62
10.3.1 ABK – Addressed and binary broadcast acknowledgement........................ 62
10.3.2 ABM – Addressed Binary and safety related message................................ 63
10.3.3 ACA – AIS regional channel assignment message...................................... 65
10.3.4 AIR – AIS interrogation request.................................................................. 68
10.3.5 BBM – Broadcast binary message............................................................... 69
10.3.6 LRI – Long-Range Interrogation ................................................................. 70
10.3.7 LRF – Long Range Function ....................................................................... 71
10.3.8 LR1 – Long-range Reply with destination for function request "A"........... 73
10.3.9 LR2 – Long-range Reply for function requests "B, C, E, and F"............... 73
IX