Let me check & see if Gen 1 will "talk" to my Gen 2's. seem to remember something about Gen 1's, but CSR has got me! I have a Lowrance Elite 7 Chirp on console in my crappie boat, trying to replace the old bow unit. I have HDS 7 & 5, gen 2, networked on my bass boat. They work great! Have them I=Linked to my MG Xi5 Trolling motor. That's what I want the newer, faster GPS puck for. Because when you hit anchor sometimes it turns the boat completely around 180! They say if you add a puck it will keep heading...