If you link them do you have to have a chart chip for each?
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Which units? Actually that may be a dumb question on my part?
I have HDS 9's and they are linked and they share mapping from my console unit.
Now the elite series can share way points but not mapping.
Hummingbird Helix 7 SI G2N and Hummingbird Helix 9 Chirp G2N
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