MY HDS 7 DOES THAT TO AT THAT SPEED,DOES VERY WELL AT LOWER SPEED,I HAVE MY TRANSDUCER MOUNTED ON VERY BACK OF TRANSOME LIKE THEY SHOW,AND MY SIDE IMAGING DOESNT DO VERY WELL AT FASTER SPEED,BUT YOU SUPPOSE TO GO SLOW TO GET ACCERATE SIDE IMAGING AND MOST OF THE TIME I HAVE BOTH GOING AT THE SAME TIME SO I GO AT SLOWER SPEEDS AND IT DOES GREAT.