I want to set up my boat with NMEA 2000. I want to share data between three different Garmin GPS/fis

Question: I want to set up my boat with NMEA 2000. I want to share data between three different Garmin GPS/fishfinders. My goal is to have the same info on all 3 of them so no matter where I am at I will see the same info and only use one transducer to do it. I know my fishfinders are NMEA compatible, so I am trying to make sure I order the correct parts to set it up. If I get the starter kit plus one more T connector plus one more section of backbone I think I can accomplish what I am trying to do. Does this sound correct to you? Thanks for any help you can give.