Afraid I don't know much more that might be useful.
As I said, MaxSea customer service
(via e-mail) has been very helpful in the past. Furuno
has also been helpful, here for example (although it's the US site): Furuno USA Forum
I have MaxSea TimeZero, but don't have any external sensors connected, so can't speak to that directly.
OTOH, we also have a Furuno
and an FCV-585 fishfinder
, slightly similar to your FCV-291. The plotter essentially uses MaxSea TZ as it's internal "engine" so the display is very similar to what you see in MaxSea TZ.
Info from our fishfinder
(depth, speed through water
temp) can displayed in a data box on the screen
. The visual representation of the bottom structure is not displayed on the plotter.
I have no clue about your AIS system and what you might be able to display on TZ. Our Furuno AIS system does display on the NN3D plotter, so I think that means it's theoretically possible to send AIS info to TZ on a computer... but that's as far as I can get.