As the degree of tilt increases, the absence of an indicator in {TAIL ~ one or more compartments} will indicate the degree of {HEAD ~ tilt} 
As the degree of tilt increases , the absence of an indicator in { TAIL ~ one or more compartments } will indicate the degree of { HEAD ~ tilt }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD