{HEAD ~ A new stage velocity} can be determined by multiplying {TAIL ~ the current stage velocity} by the factor or by subtracting a predetermined velocity increment from the current velocity 
determined by multiplying
{ HEAD ~ A new stage velocity } can be determined by multiplying { TAIL ~ the current stage velocity } by the factor or by subtracting a predetermined velocity increment from the current velocity
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH