[TG] Two displays - sharing AIS and charts?

Hello:

I have two Raymarine MFD's on board my yacht, one is a C-80 and the other a C-70. They are both connected to the SeaTalk network.
Both units show all the transducer information (wind, compass, depth etc) fine.
Can I share one chart onto the two displays, or do I need two separate charts?

Thanks
IcarusBop