If you have a reasonably modern plotter you do not need an "AIS display", just plug
digital output into your plotter. If you're using a slow NMEA
183 connection method turn off the AIS in Sydney
Harbour (or everything else will be killed by the flood of AIS traffic).
If you have an old plotter .. consider replacing it instead of an "AIS display". If you can make it, have a look at the Sydney Boat Show
starting July 30. My plotter is a touchscreen which overlays the AIS onto the chart. you can just touch a vessel and get all the data. It also show the CPA (Closes Point of Approach) visually and numerically, which is what you need to know to avoid a collision
An essential device for travel up the East Coast
of Oz because one is usually in the middle of a shipping
lane. This is also the second safest place to sail, the safest being 50+ miles offshore
. The evil enemy out there is the fishing
boat. They don't show on AIS and they don't show on radar
and they're short handed (no skipper
on bridge) and night blind. But they tend to avoid bulkies too.