AIT1500, 1500N2K, 2000, AIT2500 & Nomad
16 Docs
Why can’t I program voyage destination?
Last Updated: September 15, 2025Data such as: Destination Port, ETA, Navigation Status, Number of People on Board, etc. are only supported and transmitted by larger commercial vessels that are mandated to fit Class A AIS transponders. Class B and B+ transponders of the sort found on smaller vessels and pleasure boats, cannot transmit this data.
DSC and TX Warning Messages in proAIS2
Last Updated: September 15, 2025In the proAIS2 Diagnostics page, you will often see DSC and TX Attempt failed warnings displayed. These warnings are referring to normal AIS transponder behaviour and here is some more info on these messages… The RX 1 / RX 2 DSC start / Stop message is a completely normal message, indicating when one of the AIS receivers...
Errors on proAIS Diagnostics Table
Last Updated: September 15, 2025If you see anything in the Messages section of the proAIS2 Diagnostics page, then these are just temporary warnings and usually nothing to worry about, it is when critical events happen that you need to worry and these appear in the Alarms section and invariably also cause a change in LED status and one or...
What’s the LEN value of the AIS?
Last Updated: September 15, 2025All Digital Yacht AIS transponders have the LEN value = 1, except our AIT1500N2K which has LEN = 6.
AIT2500/AIT5000 – Disable NMEA 2000 Heading Reception
Last Updated: September 15, 2025All Class B and Class B+ AIS transponders can transmit the True Heading of the vessel as part of the dynamic data they transmit to other vessels; MMSI Number, Position, COG, SOG, etc. If received most charting systems will plot the AIS target with both the COG and True Heading vector displayed, useful when the...
Red Status LED flashing on my AIS transponder
Last Updated: September 15, 2025A flashing RED Status LED indicates a high VSWR reading or potentially a Power Amplifier fault. For the flashing RED Status LED issue, with the 12v power turned off to the AIS Transponder, I would visually inspect the BNC antenna connector on the AIS and make sure there are no signs of connector damage. Then...
My AIS Transponder is not transmitting
Last Updated: October 30, 2025If you think that your AIS transponder is not transmitting your position then this procedure might help you. The first step is to check if your AIS transponder is actually transmitting. If you are then sure that your AIS transponder is not transmitting then the next part explains you the factors to check. 1 –...
I cannot display AIS targets
Last Updated: September 15, 2025If you encounter an issue with AIS showing on your display (navigation software or chart Plotter) then you should follow this procedure. 1 – Issue with a Chart Plotter/VHF Radio If you cannot display AIS targets on your Chart Plotter or VHF radio, then follow this: If you have connected your AIS to your...
I don’t have a good AIS range
Last Updated: September 15, 2025AIS Transmission/Reception depends on the AIS Class A Class B AIS transponder transmit at 2 watts whereas a Class A Transponder at 12.5 watts. The Class B+ SOTDMA transponder transmits at 5 watts. This difference in power has a huge impact on the transmission range of each transponder. For a Class B AIS transponder,...
I cannot connect the USB of my AIS transponder
Last Updated: September 15, 2025If you are unable to connect your AIS transponder USB, then you should follow this section. The USB drivers are automatically downloaded with ProAIS2. I am sure your USB drivers and proAIS2 software are fine, the key issue is the power up sequence. Please power cycle the transponder in the following manner, which works every...
How to configure an AIS with ProAIS2 or AISConfig?
Last Updated: September 15, 2025This article explains how to configure an AIS transponder, either using our proAIS2 software for PC/MAC or with a free Android app called AISConfig. This article is for AIT1500, AIT1500N2K, AIT2000, AIT2500, AIT3000 and Nomad. 1- proAIS2 (available on PC & Mac) The proAIS2 software is included on the CD-ROM-rom supplied with all...
Why my boat does not appear on MarineTraffic, VesselFinder, etc.?
Last Updated: September 15, 2025It is important for you to be aware of the limitations of these online sites. As a result, do not assume that you will always be picked up by them. Each of the different online services are only as good as their network of AIS receiving stations. In many cases, these shore stations are operated...
Which VHF antenna for an AIS?
Last Updated: September 15, 2025One of the most common questions we are asked by our AIS customers, is “what antenna should I use for my AIS ?”, so we thought we would post a short article to provide an answer on VHF Antenna Options for AIS. Basically there are two VHF antenna options for AIS; fit a second dedicated...
AIS + VHF Antenna Separation
Last Updated: September 15, 2025The AIS system works on two channels in the VHF frequency range and in order to receive or transmit AIS information it is necessary for the AIS unit to be connected to a VHF antenna. One option is to fit a VHF splitter such as our SPL2000, which allows both the VHF radio and the...
No GPS signal on an AIS Transponder due to loose FME connector
Last Updated: September 15, 2025Our AIS transponders are supplied with a GPS antenna that has a 10m cable terminated in an FME connector (right hand connector in the above image). These connectors are very slim, not much larger than the coax cable and are much easier to route through the boat. We also supply an FME to TNC adaptor...
How to change the MMSI number?
Last Updated: September 16, 2025Once entered and confirmed, the MMSI number on an AIS can only be changed by a technical dealer or by Digital Yacht. This is a government requirement in many countries to ensure the security of the AIS system. If you need your MMSI number reset or changed, we offer a reprogramming service. The cost for...