If you own a 398ci SI, 598ci SI, 698ci SI, 798ci HD SI or the 899ci HD SI you can use the XI 9 20 for ice fishing.  In order for this to work properly, you will want to take the following steps.  The XI 9 19 will not work with these products.  

  1. In the Sonar Menu, you will want to select Quad Beam as your transducer.
  2. Next you may want to hide the Quad Beam View under the Views Menu Tab

This will allow you to use the ice flasher or 2D sonar views on these units and get the best possible returns.  Because a Side Imaging unit requires movement, you cannot use your Side Imaging transducer.