Wicklundrh is correct..in his statements if you just want sonar Motorguide or Minnkota will hook up to your gen 3.If you want to integrate the the Lowrance with the trolling motor you need the xi5,nema network,and gateway cable.One thing I'd like to point out with the xi5 and Lowrance running through the gateway system all of the hand remote features show up on the Lowrance screen on,off, percent of prop power,heading lock,anchor lock. ect.