Important Firmware update available for WatchMate 850

Dear WatchMate 850 owner,

We are pleased to announce the release of the latest firmware update for your Vesper Marine WatchMate 850 AIS Transponder.

This update fixes the following:

  • Further screen redraw issue fixes ( for hardware versions G and later )
  • Fix for receiver synthesizers being partially powered down during a reboot. 

More information is available in the release notes which is also included in the Windows download package. 

Note: This release contains Version 5.20.17359. If you already have this version installed, you do not need to upgrade.

IMPORTANT NOTE: We encourage owners to stay up-to-date with the latest firmware. This update is recommended to be applied to all units

The upgrade is performed by plugging your WatchMate 850 into an available USB port on your computer. If you have not previously installed the USB drivers, you'll find them on our downloads page at

To update your firmware, you need a computer running either Windows XP or later or Mac OS X 10.7 "Lion" or later and one of these packages:

On Microsoft Windows, the download is a self-extracting archive that will unpack the files into a folder on your computer. Click on the self-extracting archive and it will prompt you for a folder name. All files will be unpacked into that folder where you will find installation instructions.

On Mac OS X, open the downloaded vmAIS Configuration and Status utility and follow the instructions to install it. Then download and apply the firmware update from the link above.

If you need any assistance, please let us know by sending an email to

Thanks for choosing Vesper Marine!

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