(DG) AIS Targets disappear after a couple minutes

[Derek - Raymarine - Moderator]

Hi djpowers
Thank you for your enquiry.

Check that the AIS receiver in the RAY70 is turned OFF, if you have both the AIS650 and the RAY70 enabled, then it is possible the data is conflicting and triggering the issue.

Can you also check the vessel's location versus the location of the distant targets - it is possible that the furthest targets may be transmitting via a repeater station and this can trigger issues.

Check the VSWR of the AIS650 via the PROAIS2 software - supplied with the AIS650, this will indicate any issues with the antenna cabling between the AIS650, the Splitter and the VHF aerial. click here for more information regarding aerial checks.

It is possible a defective AIS splitter or connection in the cable could be reducing the efficiency of the AIS triggering this issue.

There is no setting in the software which reduces the visible targets

Regards