In {HEAD ~ the preferred embodiment}, the vehicle is a missile having {TAIL ~ an inertial navigation system} 
In { HEAD ~ the preferred embodiment } , the vehicle is a missile having { TAIL ~ an inertial navigation system }
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL