What fish finder to us with terrova us2 .

Guy what fish finder would you recommend to use on a terrova us2.want a 2d fish finder with gps.was thanking helix 7.what unit do you guys have to your us2.thanks for your help.i was told I can't us a di unit even know I will only use the 2d they say it won't work

any 2D with GPS will work, I run a 798ci hd si on my maxxum pro, but also have the transducer mounted on it. I personally don't see any advantage to just using 2D when there are so many other options