Glad you have fixed this. I first thought you had the same problem as I had. I use an iPad
for inshore chartplotting as the charts
are a lot cheaper for the same thing as I would get on the Zeus. A few months ago a software
upgrade for the Zeus had it sending messages on the ethernet with class B AIS positions received from other vessels as our own positions so our boat position kept jumping from current
location to the location(s) of the other vessel(s) around.
B&G have a fix for this apparently which should be in there next release in the meantime I have downgraded to an older version of the Zeus software