The control unit 16 senses {TAIL ~ all the command} inputs from the driver through the various vehicle control devices described above and computes the position, speed and direction of travel of the simulated vehicle in {HEAD ~ a simulated universe} 
The control unit 16 senses { TAIL ~ all the command } inputs from the driver through the various vehicle control devices described above and computes the position , speed and direction of travel of the simulated vehicle in { HEAD ~ a simulated universe }
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD