Join Date: Nov 2009
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I have that arrangement on my boat using Raymarine C90W chartplotters with a high speed bus connecting them. There are other models that will allow you to operate in this configuration, but I can vouch for the performance of the Raymarine units that I have. My previous arrangement used older generation Raytheon units that were hooked up in similar fashion and provided excellent service for 10 years (until a lightning strike).
With the older units, I would use the one below for a radar watch (typically in fog) while using the one at the helm for navigation. Either unit could display radar or charts. With the new units, I can use a radar overlay on the chart and adjust the transparency, so it isn't as compelling to have two displays, except for the convenience of setting up waypoints and planning the next day's navigation in the comfort of the cabin.