That's correct, however for some reason. Most places still list a skew for it.
I think a little clarification is needed.See my example? If your dish was aimed true south, as we start out in the c band or ku fta world with polar dish mounts that track the sky.. The lnbf 0, or skew reference would in fact be at zero. If you popped the plastic cover off and looked down the throat you would see the antenna probes aligned vertically and horizontally. Just like a +. Kinda'.
As you scan the arc west. Skew needs to tilt the lnbf to match the satellites apparent tilt in the sky also.
Imagine looking at the horizon through a fisheye lens pointing due south. The horizon no longer looks flat.
If you look east in the camera viewfinder (not moving the camera), you have to tilt your head to the left, or ccw, to get a flat view of your yard.
And the same looking west. Tilt your head right, or cw, to get the Ford in the driveway so it doesn't look like it's in a Joie Chitwood show.
So from the back of the dish looking at the sky.As you hunt for satellites west from true south. You turn the dish clockwise. Again look at my graphic.
You will find in a single lnbf situation if you do not add skew. You may snag a signal and peak your dish for highest readings. But you should add skew to what the listings say for your location. Then alternately tune in a horizontal and then vertical transponder and adjust skew in very small amounts until the signal strength is balanced for both polarities.
Again. Kinda'.