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Support for AIT250 and AIT1000



Usually our posts are about the latest and greatest, but with thoughts turning to the new season, I thought I would give some advice on two of our older but very popular products; the AIT250 and AIT1000 Class B Transponders. Both of these two products are based on the same Transponder PCB, which can still be repaired/serviced although PCB failures are fairly rare and faults can usually be traced to antennas or external wiring.

If you are the proud owner of one of these units, then you can be confident that should you have any problems, we are here to help you sort them out. We have produced a fault finding guide that covers the most common installation problems and also explains how to use the proAIS software to diagnose and fix problems. Click here for a copy of the Class B Transponder Fault finding Guide which is applicable to both of these units but not the latest AIT2000.

If you have lost the manuals for either of these two products click on the relevant link below to download a PDF copy or if you want the latest proAIS software for your PC or the USB drivers for the AIT1000.

 AIT250 Manual

–  AIT1000 Manual

–  proAIS Software

–  Windows USB Drivers for AIT1000

The proAIS software really is your best tool in checking and fault finding these older transponders and this video provides a useful guide to using proAIS…

The latest firmware is also available V10.11.14.0, but we would only recommend installing this if you are experiencing interfacing or TX time out problems.

Finally the only known issue with either of these products is intermittent “Phantom” Silent Switch operation on the AIT1000. If you see the occasional flashing of the blue Silent LED or the yellow TX time out keeps coming on, then it is worth either switching the Silent Switch setting in proAIS to “Switch has no function” if you do not have a Silent Switch fitted or alternatively connect the Blue wire in the Power/Data cable to the Black wire. This fault is due to spurious electrical noise “spikes” in some installations triggering the Silent Mode and shorting these two wires together or turning off the Silent Switch function fixes the problem.


  1. Roy Cummings says:

    Link to software does not work 15/3. Please advise on way ahead

  2. digitalyacht says:

    Hi Roy, I think this was just a temporary glitch while some work was being done on our website. Please try again now.

    • Sten Engelstoft says:

      2/4-14… links to AIT1000 USB drivers does not seem to work, I really need new drivers after having updated to win 8.1. please help urgently. Sten

      • digitalyacht says:

        Hi Sten, sorry our UK site was down for a few hours today but is now up and running again so the links should work now.

  3. Adam Dunlop says:

    Link to software doesn’t appear to be working.

    • digitalyacht says:

      Hi Adam, we have been having some problems on our main website, but it is running now and you should be able to download these files.

  4. Daniel Neumann says:

    Hi link to software down

    • digitalyacht says:

      Hi Daniel, site is up again now. If there is anything else I can help with please let me know. Best regards Paul

  5. Kristian Flodin says:

    Link to manuals are not working.

  6. conor says:

    Hi, the links above – to the AIT250 driver and fault finding guide aren’t working – can you provide working ones?

  7. Chris Doyle says:

    Dear Sir,
    I have a Smart Tracker AIT 250 that has developed a fault.
    Recently the yellow warning light on the unit remained on and an AIS Antenna VSWR fault alarm was indicated regularly on the Raymarine chart plotter.
    I have initially been able to connect a computer to run the diagnostic test that initially showed a problem with TX forward and reverse power figures (3 and 2 respectively).
    I then installed the most up to date software for the AIT 250 from your website and this appeared to be installed correctly.
    Although now when I switch on the unit I get a constant yellow warning light along with a green, blue and red warning light flashing once every two seconds.
    I am now not able to connect the computer to the unit as it comes up with an error message: ‘Can’t communicate with unit on COM4. Please check power and data connections.
    Please would you be able to offer any assistance with this problem.
    Many thanks,

    • Digital Yacht says:

      Hi Chris,

      I think the AIT250 is going to have to come back to us for investigation. That LED behaviour is not normal and indicates a possible problem with the application firmware. It should be recoverable, but best to send it to us, as we cannot do this remotely.

      Please contact us at support@digitalyacht.co.uk

  8. Eric Whitelaw says:

    Id like to move my AIT1000 to my new boat with different name and call sign is this possible?

    • Digital Yacht says:


      Yes it is possible. You will need to return us the product so that we can reset it and program it with your new boat name, MMSI number, etc.

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