My dad has the 899ci SI combo unit. He upgraded to the HD transducer and everything was fine. However, he recently sold hid bass boat and bought a pontoon boat. The transducer cable is now about 7' short so he needs an extension cable. Humminbird has more than one option and I'm not sure which one he needs. Does anyone know which cable he should get?
I thought he needed the EC W10 but my dad says the upgraded transducer (XHS 9 HDSI 180T) has 5 pins and the Humminbird website only lists 7 & 14 pin cables.