A determination is made of whether {HEAD ~ the stage velocity} is greater than {TAIL ~ a specified value} 
is greater than
A determination is made of whether { HEAD ~ the stage velocity } is greater than { TAIL ~ a specified value }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL