If youre determined to get it to work at high speed it is going to have to be mounted so that the transducer is in the water when the boat is on plane! Thats not something that is important to me! I strongly suspect that if it was mounted so that it would work when on plane, youd be disappointed with the results — operating at speed would have to greatly compress what is shown on the screen, losing a LOT of detail!. I havent actually measured it, but my location is probably about 15″ from the conventional sonar transducer location. I have not had an opportunity to use the downscan overlay mode yet so dont know if the location will have any effect on that — personally I doubt the extra few inches will be significant! If there is an effect, Ill simply set my HDS7 to split-screen mode showing conventional sonar in one pane and downscan in the other. If youll look at the wide variety of screen shot pictures posted on various Internet sites, youll notice that most, if not all of them, were taken at idle speeds (3 – 4 mph) When Im running on plane, Ill use the conventional sonar and only turn on the LSS-1 when I want a closer look and will be idling around! Some have mounted it on the “step” as shown in the LSS-1 installation instructions and that will place it slightly closer to the conventional transducer. However I cant believe it will operate when the boat is on plane as the “step” is out of the water when the boat is planed out. For me the other major consideration is that a transom mount or a “step” mount would require drilling holes in the fiberglass. I refuse to do that! C.
.
