thanks Bob B and Greg
You are correct bob... I was mistaken in my terminology and expectations..... I added a dual beam transducer to my bilge and connected the side imaging transducer on my transom with a Y cable to the 898 head unit ,thinking I would get down imaging and dual beam imaging from the bilge ducer (on plane). I now think, I am correct in thinking, that I will only get the switchfire mode on plane? Is that correct?
thanks for the help