Chart Plotters non-AIS.

Onwa chart plotters without AIS built-in.  All Onwa multifunction chart plotters without an AIS transceiver do have a dedicated AIS page and when sent AIS data from an external source ( a VHF radio with an AIS receiver or an AIS  ‘Black Box’) will become, in-effect, an AIS Receive plotter complete with collision alarms. This makes an ideal choice for anyone with a black box receiver or VHF radio with basic AIS receive function to see the AIS targets overlaid onto the chart.