I have a HDS-9 Gen 3 at the console and a HDS-7 Gen 2 touch at the bow. I have them networked together so I can share transducers and waypoints. I have an HDI (downscan) transducer on the trolling motor and the downscan and side scan transducer on the back of the boat.
Since you already have a hummingbird, I would just stay with hummingbird. Can you network the 998?
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