Hooking up humminbirds to new boat and I found that I have a cable, AS YC, that I have no idea where I got it or what it is used for. Humminbird site says it is for more than one Advance accessory system unit but I have no idea what that is. Anyone know what it is used for?
for adding accessories like weathersense . xm weather and . has a comm. plug and a accessory plug. Usually came with any of those accessories. Plug your gps puck in one side and the accessory into the other and plug into the back of the unit