Thanks. Do you still need to have the ducer applied at a particular depth, relative to the TM or not. Guessing if it is fore or aft then not so much. Except aft one would need to just ensure they were below hull. Thinking sv/si here mostly. Mine is currently on the TM. Experiencing some rf that I can't seem to resolve and may go this route. The turning of the TM and the sv/si effect on the screen is very minor to me. But the rf is something I would like to fix. I have a spare-barely been wet--gt52hw that I am going to hang over the side and see how far away I must go to be rid of the rf. Then I will know what way(s) I may have open for install. I am only in a 1436 jon so my front deck is limited with a bow mount and ram mounted Garmin already there. TY