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I am picture challenged. ".........splitting the difference........." would be trying not to immerse the entire transducer into the water attempting to make the unit parallel with the water. When the transducer is too low the turbulence affects it signal. That is why you only try to have 1/3 +- of the unit below the bottom of the boat. Let's say the boats bottom is at a 30 degree angle to the water (looking at it from the transom side). Install the unit at 15 degrees.......maybe a little more parallel to the water. If the unit is installed completely parallel with the water on the starboard side of the motor. The port side of the unit would be 1/3 below the bottom of the boat but the starboard side would be completely below creating bubbles that create a disturbance and poor reading. Just tilt up the starboard side of the unit in degrees so maybe 1/2 of the unit +- is below the bottom. I install them with the attachment screws on the upper side of the unit with the top 3/8" open for adjustment.